Switch to nyc

3 files changed, 794 insertions, 134 deletions

diff --git a/.gitignore b/.gitignore
index f4cabbb..72650cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 node_modules/
 coverage/
 lib-cov/
+.nyc_output/
 coverage.json
 npm-debug.log
 
diff --git a/package-lock.json b/package-lock.json
index 72a2468..efe6e29 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,137 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
+      "integrity": "sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQag/ztrBC7wegWoQ1nLREPVSKSW8byhTlzTKyNE4ifaTA6lCp7JjpFw==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.0.0"
+      }
+    },
+    "@babel/generator": {
+      "version": "7.7.2",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.7.2.tgz",
+      "integrity": "sha512-WthSArvAjYLz4TcbKOi88me+KmDJdKSlfwwN8CnUYn9jBkzhq0ZEPuBfkAWIvjJ3AdEV1Cf/+eSQTnp3IDJKlQ==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.7.2",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.17.13",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        }
+      }
+    },
+    "@babel/helper-function-name": {
+      "version": "7.7.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.7.0.tgz",
+      "integrity": "sha512-tDsJgMUAP00Ugv8O2aGEua5I2apkaQO7lBGUq1ocwN3G23JE5Dcq0uh3GvFTChPa4b40AWiAsLvCZOA2rdnQ7Q==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-get-function-arity": "^7.7.0",
+        "@babel/template": "^7.7.0",
+        "@babel/types": "^7.7.0"
+      }
+    },
+    "@babel/helper-get-function-arity": {
+      "version": "7.7.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.7.0.tgz",
+      "integrity": "sha512-tLdojOTz4vWcEnHWHCuPN5P85JLZWbm5Fx5ZsMEMPhF3Uoe3O7awrbM2nQ04bDOUToH/2tH/ezKEOR8zEYzqyw==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.7.0"
+      }
+    },
+    "@babel/helper-split-export-declaration": {
+      "version": "7.7.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.7.0.tgz",
+      "integrity": "sha512-HgYSI8rH08neWlAH3CcdkFg9qX9YsZysZI5GD8LjhQib/mM0jGOZOVkoUiiV2Hu978fRtjtsGsW6w0pKHUWtqA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.7.0"
+      }
+    },
+    "@babel/highlight": {
+      "version": "7.5.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.5.0.tgz",
+      "integrity": "sha512-7dV4eu9gBxoM0dAnj/BCFDW9LFU0zvTrkq0ugM7pnHEgguOEeOz1so2ZghEdzviYzQEED0r4EAgpsBChKy1TRQ==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      }
+    },
+    "@babel/parser": {
+      "version": "7.7.3",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.7.3.tgz",
+      "integrity": "sha512-bqv+iCo9i+uLVbI0ILzKkvMorqxouI+GbV13ivcARXn9NNEabi2IEz912IgNpT/60BNXac5dgcfjb94NjsF33A==",
+      "dev": true
+    },
+    "@babel/template": {
+      "version": "7.7.0",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.7.0.tgz",
+      "integrity": "sha512-OKcwSYOW1mhWbnTBgQY5lvg1Fxg+VyfQGjcBduZFljfc044J5iDlnDSfhQ867O17XHiSCxYHUxHg2b7ryitbUQ==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.0.0",
+        "@babel/parser": "^7.7.0",
+        "@babel/types": "^7.7.0"
+      }
+    },
+    "@babel/traverse": {
+      "version": "7.7.2",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.7.2.tgz",
+      "integrity": "sha512-TM01cXib2+rgIZrGJOLaHV/iZUAxf4A0dt5auY6KNZ+cm6aschuJGqKJM3ROTt3raPUdIDk9siAufIFEleRwtw==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.5.5",
+        "@babel/generator": "^7.7.2",
+        "@babel/helper-function-name": "^7.7.0",
+        "@babel/helper-split-export-declaration": "^7.7.0",
+        "@babel/parser": "^7.7.2",
+        "@babel/types": "^7.7.2",
+        "debug": "^4.1.0",
+        "globals": "^11.1.0",
+        "lodash": "^4.17.13"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        }
+      }
+    },
+    "@babel/types": {
+      "version": "7.7.2",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.7.2.tgz",
+      "integrity": "sha512-YTf6PXoh3+eZgRCBzzP25Bugd2ngmpQVrk7kXX0i5N9BO7TFBtIgZYs7WtxtOGs8e6A4ZI7ECkbBCEHeXocvOA==",
+      "dev": true,
+      "requires": {
+        "esutils": "^2.0.2",
+        "lodash": "^4.17.13",
+        "to-fast-properties": "^2.0.0"
+      }
+    },
     "@snyk/dep-graph": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/@snyk/dep-graph/-/dep-graph-1.4.0.tgz",
@@ -29,9 +160,9 @@
       "dev": true
     },
     "abbrev": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.9.tgz",
-      "integrity": "sha1-kbR5JYinc4wl813W9jdSovh3YTU=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
       "dev": true
     },
     "agent-base": {
@@ -103,6 +234,15 @@
       "integrity": "sha1-ZlWX3oap/+Oqm/vmyuXG6kJrSXk=",
       "dev": true
     },
+    "append-transform": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/append-transform/-/append-transform-1.0.0.tgz",
+      "integrity": "sha512-P009oYkeHyU742iSZJzZZywj4QRJdnTWffaKuJQLablCZ1uz6/cW4yaRgcDaoQ+uwOxxnt0gRUcwfsNP2ri0gw==",
+      "dev": true,
+      "requires": {
+        "default-require-extensions": "^2.0.0"
+      }
+    },
     "archy": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/archy/-/archy-1.0.0.tgz",
@@ -243,6 +383,36 @@
       "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
       "dev": true
     },
+    "caching-transform": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/caching-transform/-/caching-transform-3.0.2.tgz",
+      "integrity": "sha512-Mtgcv3lh3U0zRii/6qVgQODdPA4G3zhG+jtbCWj39RXuUFTMzH0vcdMtaJS1jPowd+It2Pqr6y3NJMQqOqCE2w==",
+      "dev": true,
+      "requires": {
+        "hasha": "^3.0.0",
+        "make-dir": "^2.0.0",
+        "package-hash": "^3.0.0",
+        "write-file-atomic": "^2.4.2"
+      },
+      "dependencies": {
+        "make-dir": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-2.1.0.tgz",
+          "integrity": "sha512-LS9X+dc8KLxXCb8dni79fLIIUA5VyZoyjSMCwTluaXA0o27cCK0bhXkpgw+sTXVpPy/lSO57ilRixqk0vDmtRA==",
+          "dev": true,
+          "requires": {
+            "pify": "^4.0.1",
+            "semver": "^5.6.0"
+          }
+        },
+        "pify": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+          "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
+          "dev": true
+        }
+      }
+    },
     "camelcase": {
       "version": "5.3.1",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
@@ -271,12 +441,6 @@
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       },
       "dependencies": {
-        "has-flag": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
-          "dev": true
-        },
         "supports-color": {
           "version": "5.5.0",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
@@ -308,22 +472,6 @@
       "requires": {
         "exit": "0.1.2",
         "glob": "^7.1.1"
-      },
-      "dependencies": {
-        "glob": {
-          "version": "7.1.3",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
-          "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
-          "dev": true,
-          "requires": {
-            "fs.realpath": "^1.0.0",
-            "inflight": "^1.0.4",
-            "inherits": "2",
-            "minimatch": "^3.0.4",
-            "once": "^1.3.0",
-            "path-is-absolute": "^1.0.0"
-          }
-        }
       }
     },
     "cli-boxes": {
@@ -406,12 +554,18 @@
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     },
     "commander": {
-      "version": "2.20.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
-      "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==",
+      "version": "2.20.3",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+      "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
       "dev": true,
       "optional": true
     },
+    "commondir": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/commondir/-/commondir-1.0.1.tgz",
+      "integrity": "sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs=",
+      "dev": true
+    },
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -441,11 +595,51 @@
         "date-now": "^0.1.4"
       }
     },
+    "convert-source-map": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.7.0.tgz",
+      "integrity": "sha512-4FJkXzKXEDB1snCFZlLP4gpC3JILicCpGbzG9f9G7tGqGCzETQ2hWPrcinA9oU4wtf2biUaEH5065UnMeR33oA==",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "~5.1.1"
+      }
+    },
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
     },
+    "cp-file": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/cp-file/-/cp-file-6.2.0.tgz",
+      "integrity": "sha512-fmvV4caBnofhPe8kOcitBwSn2f39QLjnAnGq3gO9dfd75mUytzKNZB1hde6QHunW2Rt+OwuBOMc3i1tNElbszA==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.2",
+        "make-dir": "^2.0.0",
+        "nested-error-stacks": "^2.0.0",
+        "pify": "^4.0.1",
+        "safe-buffer": "^5.0.1"
+      },
+      "dependencies": {
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+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-2.1.0.tgz",
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+          "dev": true,
+          "requires": {
+            "pify": "^4.0.1",
+            "semver": "^5.6.0"
+          }
+        },
+        "pify": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+          "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
+          "dev": true
+        }
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@@ -530,6 +724,15 @@
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       "dev": true
     },
+    "default-require-extensions": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/default-require-extensions/-/default-require-extensions-2.0.0.tgz",
+      "integrity": "sha1-9fj7sYp9bVCyH2QfZJ67Uiz+JPc=",
+      "dev": true,
+      "requires": {
+        "strip-bom": "^3.0.0"
+      }
+    },
     "define-properties": {
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@@ -678,6 +881,15 @@
       "integrity": "sha1-sph6o4ITR/zeZCsk/fyeT7cSvyY=",
       "dev": true
     },
+    "error-ex": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
+      "integrity": "sha512-7dFHNmqeFSEt2ZBsCriorKnn3Z2pj+fd9kmI6QoWw4//DL+icEBfc0U7qJCisqrTsKTjw4fNFy2pW9OqStD84g==",
+      "dev": true,
+      "requires": {
+        "is-arrayish": "^0.2.1"
+      }
+    },
     "es-abstract": {
       "version": "1.13.0",
       "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.13.0.tgz",
@@ -703,6 +915,12 @@
         "is-symbol": "^1.0.2"
       }
     },
+    "es6-error": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/es6-error/-/es6-error-4.1.1.tgz",
+      "integrity": "sha512-Um/+FxMr9CISWh0bi5Zv0iOD+4cFh5qLeks1qhAopKVAJw3drgKbKySikp7wGhDL0HPeaja0P5ULZrxLkniUVg==",
+      "dev": true
+    },
     "es6-object-assign": {
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@@ -841,6 +1059,35 @@
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       "dev": true
     },
+    "find-cache-dir": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/find-cache-dir/-/find-cache-dir-2.1.0.tgz",
+      "integrity": "sha512-Tq6PixE0w/VMFfCgbONnkiQIVol/JJL7nRMi20fqzA4NRs9AfeqMGeRdPi3wIhYkxjeBaWh2rxwapn5Tu3IqOQ==",
+      "dev": true,
+      "requires": {
+        "commondir": "^1.0.1",
+        "make-dir": "^2.0.0",
+        "pkg-dir": "^3.0.0"
+      },
+      "dependencies": {
+        "make-dir": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-2.1.0.tgz",
+          "integrity": "sha512-LS9X+dc8KLxXCb8dni79fLIIUA5VyZoyjSMCwTluaXA0o27cCK0bhXkpgw+sTXVpPy/lSO57ilRixqk0vDmtRA==",
+          "dev": true,
+          "requires": {
+            "pify": "^4.0.1",
+            "semver": "^5.6.0"
+          }
+        },
+        "pify": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+          "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
+          "dev": true
+        }
+      }
+    },
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       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
@@ -882,6 +1129,28 @@
         "for-in": "^1.0.1"
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+    "foreground-child": {
+      "version": "1.5.6",
+      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-1.5.6.tgz",
+      "integrity": "sha1-T9ca0t/elnibmApcCilZN8svXOk=",
+      "dev": true,
+      "requires": {
+        "cross-spawn": "^4",
+        "signal-exit": "^3.0.0"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-4.0.2.tgz",
+          "integrity": "sha1-e5JHYhwjrf3ThWAEqCPL45dCTUE=",
+          "dev": true,
+          "requires": {
+            "lru-cache": "^4.0.1",
+            "which": "^1.2.9"
+          }
+        }
+      }
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@@ -986,14 +1255,15 @@
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-      "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
-      "integrity": "sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
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       "dev": true,
       "requires": {
+        "fs.realpath": "^1.0.0",
         "inflight": "^1.0.4",
         "inherits": "2",
-        "minimatch": "2 || 3",
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+        "resolve-from": "^4.0.0",
+        "rimraf": "^2.6.3",
+        "signal-exit": "^3.0.2",
+        "spawn-wrap": "^1.4.2",
+        "test-exclude": "^5.2.3",
+        "uuid": "^3.3.2",
+        "yargs": "^13.2.2",
+        "yargs-parser": "^13.0.0"
+      },
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+        "make-dir": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-2.1.0.tgz",
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+          "dev": true,
+          "requires": {
+            "pify": "^4.0.1",
+            "semver": "^5.6.0"
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+        },
+        "pify": {
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+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
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+          "dev": true
+        },
+        "uuid": {
+          "version": "3.3.3",
+          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",
+          "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ==",
+          "dev": true
+        }
+      }
+    },
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       "version": "0.9.0",
       "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
@@ -2186,6 +2693,12 @@
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       }
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+    "os-homedir": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
+      "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M=",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
@@ -2299,6 +2812,18 @@
         "thunkify": "^2.1.2"
       }
     },
+    "package-hash": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/package-hash/-/package-hash-3.0.0.tgz",
+      "integrity": "sha512-lOtmukMDVvtkL84rJHI7dpTYq+0rli8N2wlnqUcBuDWCfVhRUfOmnR9SsoHFMLpACvEV60dX7rd0rFaYDZI+FA==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.15",
+        "hasha": "^3.0.0",
+        "lodash.flattendeep": "^4.4.0",
+        "release-zalgo": "^1.0.0"
+      }
+    },
     "package-json": {
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       "resolved": "https://registry.npmjs.org/package-json/-/package-json-4.0.1.tgz",
@@ -2317,6 +2842,16 @@
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       "dev": true
     },
+    "parse-json": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-4.0.0.tgz",
+      "integrity": "sha1-vjX1Qlvh9/bHRxhPmKeIy5lHfuA=",
+      "dev": true,
+      "requires": {
+        "error-ex": "^1.3.1",
+        "json-parse-better-errors": "^1.0.1"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
@@ -2341,6 +2876,21 @@
       "integrity": "sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=",
       "dev": true
     },
+    "path-parse": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
+      "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==",
+      "dev": true
+    },
+    "path-type": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/path-type/-/path-type-3.0.0.tgz",
+      "integrity": "sha512-T2ZUsdZFHgA3u4e5PfPbjd7HDDpxPnQb5jN0SrDsjNSuVXHJqtwTnWqG0B1jZrgmJ/7lj1EmVIByWt1gxGkWvg==",
+      "dev": true,
+      "requires": {
+        "pify": "^3.0.0"
+      }
+    },
     "performance-now": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
@@ -2352,6 +2902,15 @@
       "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
       "dev": true
     },
+    "pkg-dir": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-3.0.0.tgz",
+      "integrity": "sha512-/E57AYkoeQ25qkxMj5PBOVgF8Kiu/h7cYS30Z5+R7WaiCCBfLq58ZI/dSeaEKb9WVJV5n/03QwrN3IeWIFllvw==",
+      "dev": true,
+      "requires": {
+        "find-up": "^3.0.0"
+      }
+    },
     "prelude-ls": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
@@ -2492,6 +3051,27 @@
         }
       }
     },
+    "read-pkg": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-3.0.0.tgz",
+      "integrity": "sha1-nLxoaXj+5l0WwA4rGcI3/Pbjg4k=",
+      "dev": true,
+      "requires": {
+        "load-json-file": "^4.0.0",
+        "normalize-package-data": "^2.3.2",
+        "path-type": "^3.0.0"
+      }
+    },
+    "read-pkg-up": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/read-pkg-up/-/read-pkg-up-4.0.0.tgz",
+      "integrity": "sha512-6etQSH7nJGsK0RbG/2TeDzZFa8shjQ1um+SwQQ5cwKy0dhSXdOncEhb1CPpvQG4h7FyOV6EB6YlV0yJvZQNAkA==",
+      "dev": true,
+      "requires": {
+        "find-up": "^3.0.0",
+        "read-pkg": "^3.0.0"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz",
@@ -2541,6 +3121,15 @@
         "rc": "^1.0.1"
       }
     },
+    "release-zalgo": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/release-zalgo/-/release-zalgo-1.0.0.tgz",
+      "integrity": "sha1-CXALflB0Mpc5Mw5TXFqQ+2eFFzA=",
+      "dev": true,
+      "requires": {
+        "es6-error": "^4.0.1"
+      }
+    },
     "request": {
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       "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
@@ -2593,6 +3182,12 @@
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       "dev": true
     },
+    "resolve-from": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
+      "integrity": "sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==",
+      "dev": true
+    },
     "restore-cursor": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-2.0.0.tgz",
@@ -2603,6 +3198,15 @@
         "signal-exit": "^3.0.2"
       }
     },
+    "rimraf": {
+      "version": "2.7.1",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
+      "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
+      "dev": true,
+      "requires": {
+        "glob": "^7.1.3"
+      }
+    },
     "run-async": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/run-async/-/run-async-2.3.0.tgz",
@@ -2702,12 +3306,6 @@
           "requires": {
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           }
-        },
-        "lazy-cache": {
-          "version": "0.2.7",
-          "resolved": "https://registry.npmjs.org/lazy-cache/-/lazy-cache-0.2.7.tgz",
-          "integrity": "sha1-f+3fLctu23fRHvHRF6tf/fCrG2U=",
-          "dev": true
         }
       }
     },
@@ -2778,20 +3376,6 @@
         "shelljs": "^0.8.1"
       },
       "dependencies": {
-        "glob": {
-          "version": "7.1.6",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
-          "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
-          "dev": true,
-          "requires": {
-            "fs.realpath": "^1.0.0",
-            "inflight": "^1.0.4",
-            "inherits": "2",
-            "minimatch": "^3.0.4",
-            "once": "^1.3.0",
-            "path-is-absolute": "^1.0.0"
-          }
-        },
         "shelljs": {
           "version": "0.8.3",
           "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.8.3.tgz",
@@ -2882,12 +3466,6 @@
         "uuid": "^3.3.2"
       },
       "dependencies": {
-        "abbrev": {
-          "version": "1.1.1",
-          "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
-          "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
-          "dev": true
-        },
         "debug": {
           "version": "3.2.6",
           "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
@@ -3141,16 +3719,6 @@
             "ms": "^2.1.1"
           }
         },
-        "js-yaml": {
-          "version": "3.13.1",
-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
-          "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
-          "dev": true,
-          "requires": {
-            "argparse": "^1.0.7",
-            "esprima": "^4.0.0"
-          }
-        },
         "ms": {
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
@@ -3327,6 +3895,52 @@
         }
       }
     },
+    "spawn-wrap": {
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/spawn-wrap/-/spawn-wrap-1.4.3.tgz",
+      "integrity": "sha512-IgB8md0QW/+tWqcavuFgKYR/qIRvJkRLPJDFaoXtLLUaVcCDK0+HeFTkmQHj3eprcYhc+gOl0aEA1w7qZlYezw==",
+      "dev": true,
+      "requires": {
+        "foreground-child": "^1.5.6",
+        "mkdirp": "^0.5.0",
+        "os-homedir": "^1.0.1",
+        "rimraf": "^2.6.2",
+        "signal-exit": "^3.0.2",
+        "which": "^1.3.0"
+      }
+    },
+    "spdx-correct": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.0.tgz",
+      "integrity": "sha512-lr2EZCctC2BNR7j7WzJ2FpDznxky1sjfxvvYEyzxNyb6lZXHODmEoJeFu4JupYlkfha1KZpJyoqiJ7pgA1qq8Q==",
+      "dev": true,
+      "requires": {
+        "spdx-expression-parse": "^3.0.0",
+        "spdx-license-ids": "^3.0.0"
+      }
+    },
+    "spdx-exceptions": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/spdx-exceptions/-/spdx-exceptions-2.2.0.tgz",
+      "integrity": "sha512-2XQACfElKi9SlVb1CYadKDXvoajPgBVPn/gOQLrTvHdElaVhr7ZEbqJaRnJLVNeaI4cMEAgVCeBMKF6MWRDCRA==",
+      "dev": true
+    },
+    "spdx-expression-parse": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/spdx-expression-parse/-/spdx-expression-parse-3.0.0.tgz",
+      "integrity": "sha512-Yg6D3XpRD4kkOmTpdgbUiEJFKghJH03fiC1OPll5h/0sO6neh2jqRDVHOQ4o/LMea0tgCkbMgea5ip/e+MkWyg==",
+      "dev": true,
+      "requires": {
+        "spdx-exceptions": "^2.1.0",
+        "spdx-license-ids": "^3.0.0"
+      }
+    },
+    "spdx-license-ids": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.5.tgz",
+      "integrity": "sha512-J+FWzZoynJEXGphVIS+XEh3kFSjZX/1i9gFBaWQcB+/tmpe2qUsSBABpcxqxnAxFdiUFEgAX1bjYGQvIZmoz9Q==",
+      "dev": true
+    },
     "sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
@@ -3379,6 +3993,12 @@
         "ansi-regex": "^3.0.0"
       }
     },
+    "strip-bom": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
+      "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
+      "dev": true
+    },
     "strip-eof": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
@@ -3392,12 +4012,12 @@
       "dev": true
     },
     "supports-color": {
-      "version": "3.2.3",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-3.2.3.tgz",
-      "integrity": "sha1-ZawFBLOVQXHYpklGsq48u4pfVPY=",
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
+      "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
       "dev": true,
       "requires": {
-        "has-flag": "^1.0.0"
+        "has-flag": "^3.0.0"
       }
     },
     "temp-dir": {
@@ -3453,6 +4073,18 @@
         }
       }
     },
+    "test-exclude": {
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-5.2.3.tgz",
+      "integrity": "sha512-M+oxtseCFO3EDtAaGH7iiej3CBkzXqFMbzqYAACdzKui4eZA+pq3tZEwChvOdNfa7xxy8BfbmgJSIr43cC/+2g==",
+      "dev": true,
+      "requires": {
+        "glob": "^7.1.3",
+        "minimatch": "^3.0.4",
+        "read-pkg-up": "^4.0.0",
+        "require-main-filename": "^2.0.0"
+      }
+    },
     "then-fs": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/then-fs/-/then-fs-2.0.0.tgz",
@@ -3489,6 +4121,12 @@
         "os-tmpdir": "~1.0.2"
       }
     },
+    "to-fast-properties": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-2.0.0.tgz",
+      "integrity": "sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=",
+      "dev": true
+    },
     "toml": {
       "version": "2.3.6",
       "resolved": "https://registry.npmjs.org/toml/-/toml-2.3.6.tgz",
@@ -3540,13 +4178,13 @@
       }
     },
     "uglify-js": {
-      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
-      "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
+      "version": "3.6.9",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.9.tgz",
+      "integrity": "sha512-pcnnhaoG6RtrvHJ1dFncAe8Od6Nuy30oaJ82ts6//sGSXOP5UjBMEthiProjXmMNHOfd93sqlkztifFMcb+4yw==",
       "dev": true,
       "optional": true,
       "requires": {
-        "commander": "~2.20.0",
+        "commander": "~2.20.3",
         "source-map": "~0.6.1"
       },
       "dependencies": {
@@ -3627,6 +4265,16 @@
       "integrity": "sha512-jZnMwlb9Iku/O3smGWvZhauCf6cvvpKi4BKRiliS3cxnI+Gz9j5MEpTz2UFuXiKPJocb7gnsLHwiS05ige5BEA==",
       "dev": true
     },
+    "validate-npm-package-license": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
+      "dev": true,
+      "requires": {
+        "spdx-correct": "^3.0.0",
+        "spdx-expression-parse": "^3.0.0"
+      }
+    },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
@@ -3676,6 +4324,12 @@
         "string-width": "^2.1.1"
       }
     },
+    "window-size": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.4.tgz",
+      "integrity": "sha1-+OGqHuWlPsW/FR/6CXQqatdpeHY=",
+      "dev": true
+    },
     "windows-release": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/windows-release/-/windows-release-3.1.0.tgz",
diff --git a/package.json b/package.json
index edf0ced..56b2e8a 100644
--- a/package.json
+++ b/package.json
@@ -12,9 +12,9 @@
   "scripts": {
     "lint": "jshint ./lib ./test ./index.js",
     "mocha": "_mocha -b -R spec",
-    "test-cov": "istanbul cover npm run mocha",
+    "test-cov": "nyc npm run mocha",
     "pretest-coveralls": "npm run pretest",
-    "test-coveralls": "istanbul cover npm run mocha -- --report lcovonly && shx cat ./coverage/lcov.info | node ./bin/coveralls.js --verbose",
+    "test-coveralls": "nyc npm run mocha && shx cat ./coverage/lcov.info | node ./bin/coveralls.js --verbose",
     "pretest": "cross-env-shell \"echo TRAVIS_JOB_ID $TRAVIS_JOB_ID\"",
     "test": "snyk test && npm run lint && npm run mocha"
   },
@@ -45,10 +45,9 @@
   },
   "devDependencies": {
     "cross-env": "^5.2.1",
-    "istanbul": "^0.4.5",
     "jshint": "^2.10.1",
     "mocha": "^6.1.4",
-    "mocha-lcov-reporter": "^1.2.0",
+    "nyc": "^14.1.1",
     "should": "^9.0.2",
     "shx": "^0.3.2",
     "sinon-restore": "^1.0.1",
@@ -66,5 +65,11 @@
     "url": "git://github.com/nickmerwin/node-coveralls.git"
   },
   "author": "Gregg Caines",
-  "license": "BSD-2-Clause"
+  "license": "BSD-2-Clause",
+  "nyc": {
+    "reporter": [
+      "lcov",
+      "text-summary"
+    ]
+  }
 }