diff --git a/package-lock.json b/package-lock.json
index 311da0f..9b929c0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,12 +4,6 @@
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@@ -21,18 +15,18 @@
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-      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
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@@ -91,6 +109,61 @@
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+          "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz",
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+          "dev": true,
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+          "resolved": "https://registry.npmjs.org/is-descriptor/-/is-descriptor-1.0.2.tgz",
+          "integrity": "sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==",
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@@ -109,41 +182,65 @@
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@@ -206,16 +315,35 @@
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-      "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
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+      "integrity": "sha1-S8A3PBZLwykbTTaMgpzxqApZ3KA=",
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@@ -241,20 +366,38 @@
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-      "dev": true,
-      "requires": {
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@@ -273,15 +416,6 @@
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+          "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
+          "dev": true,
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+      "dev": true,
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+          "resolved": "https://registry.npmjs.org/has-values/-/has-values-0.1.4.tgz",
+          "integrity": "sha1-bWHeldkd/Km5oCCJrThL/49it3E=",
+          "dev": true
+        },
+        "isarray": {
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+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+          "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=",
+          "dev": true
+        }
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
+      "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
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@@ -1564,16 +2396,6 @@
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@@ -1593,11 +2415,132 @@
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+      "requires": {
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+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "dev": true,
+          "requires": {
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+        "string-width": {
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+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
+          "requires": {
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+            "is-fullwidth-code-point": "^1.0.0",
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       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
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+    },
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+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
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+      "requires": {
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+        "lodash": "^4.17.11",
+        "yargs": "^12.0.5"
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+        }
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index cf39351..0d953e7 100644
--- a/package.json
+++ b/package.json
@@ -49,6 +49,6 @@
   ],
   "devDependencies": {
     "chai": "^3.5.0",
-    "mocha": "^5.0.0"
+    "mocha": "^6.0.0"
   }
 }