diff --git a/package-lock.json b/package-lock.json
index 2b9f1e6..83342d2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,34 @@
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@@ -53,27 +70,27 @@
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@@ -872,35 +974,49 @@
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+            "is-plain-object": "^2.0.1",
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+      "dev": true,
+      "requires": {
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+      "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
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@@ -3621,29 +5344,85 @@
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       "dev": true,
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
+      "dev": true
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+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
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+      "dev": true,
+      "requires": {
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+    "wrap-ansi": {
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+      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "dev": true,
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+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "dev": true,
+          "requires": {
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+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
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+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "dev": true,
+          "requires": {
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-      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
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@@ -3664,12 +5443,61 @@
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-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+    "y18n": {
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+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
       "dev": true
     },
+    "yargs": {
+      "version": "12.0.5",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.5.tgz",
+      "integrity": "sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==",
+      "dev": true,
+      "requires": {
+        "cliui": "^4.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^3.0.0",
+        "get-caller-file": "^1.0.1",
+        "os-locale": "^3.0.0",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^1.0.1",
+        "set-blocking": "^2.0.0",
+        "string-width": "^2.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^3.2.1 || ^4.0.0",
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+    "yargs-parser": {
+      "version": "11.1.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-11.1.1.tgz",
+      "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
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+    "yargs-unparser": {
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+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.5.0.tgz",
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+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.11",
+        "yargs": "^12.0.5"
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+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
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+          "dev": true
+        }
+      }
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     "yauzl": {
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diff --git a/package.json b/package.json
index 641cb49..8c9269b 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "babel-cli": "^6.26.0",
     "babel-preset-es2015": "^6.24.1",
     "eslint": "^5.0.0",
-    "mocha": "^5.2.0",
+    "mocha": "^6.0.0",
     "should": "^13.2.1"
   }
 }