diff --git a/package-lock.json b/package-lock.json
index af1314a..c6c0293 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -3865,6 +4179,12 @@
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+      "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
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@@ -3878,6 +4198,16 @@
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       "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ="
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+      "resolved": "https://registry.npmjs.org/osenv/-/osenv-0.1.5.tgz",
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+      "dev": true,
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@@ -3934,6 +4264,17 @@
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+      "resolved": "https://registry.npmjs.org/parse-filepath/-/parse-filepath-1.0.2.tgz",
+      "integrity": "sha1-pjISf1Oq89FYdvWHLz/6x2PWyJE=",
+      "dev": true,
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@@ -3954,6 +4295,12 @@
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+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/parse-passwd/-/parse-passwd-1.0.0.tgz",
+      "integrity": "sha1-bVuTSkVpk7I9N/QKOC1vFmao5cY=",
+      "dev": true
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@@ -3992,6 +4339,21 @@
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+      "resolved": "https://registry.npmjs.org/path-root/-/path-root-0.1.1.tgz",
+      "integrity": "sha1-mkpoFMrBwM1zNgqV8yCDyOpHRbc=",
+      "dev": true,
+      "requires": {
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+    "path-root-regex": {
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+      "integrity": "sha1-v8zcjfWxLcUsi0PsONGNcsBLqW0=",
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@@ -4016,6 +4378,12 @@
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+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
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+      "dev": true
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       "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
@@ -4555,6 +4923,15 @@
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+    "rechoir": {
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+      "resolved": "https://registry.npmjs.org/rechoir/-/rechoir-0.7.1.tgz",
+      "integrity": "sha512-/njmZ8s1wVeR6pjTZ+0nCnv8SpZNRMT2D1RLOJQESlYFDBvwpTA4KWJpZ+sBJ4+vhjILRcK7JIFdGCdxEAAitg==",
+      "dev": true,
+      "requires": {
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       "resolved": "https://registry.npmjs.org/redent/-/redent-1.0.0.tgz",
@@ -4673,6 +5050,16 @@
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+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/resolve-dir/-/resolve-dir-1.0.1.tgz",
+      "integrity": "sha1-eaQGRMNivoLybv/nOcm7U4IEb0M=",
+      "dev": true,
+      "requires": {
+        "expand-tilde": "^2.0.0",
+        "global-modules": "^1.0.0"
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       "resolved": "https://registry.npmjs.org/resolve-url/-/resolve-url-0.2.1.tgz",
@@ -4692,10 +5079,38 @@
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-      "integrity": "sha1-5Dm+Kq7jJzIZUnMPmaiSnk/FBYI=",
-      "dev": true
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
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+      "dev": true,
+      "requires": {
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+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
+          "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
+          "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"
+          }
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+        "minimatch": {
+          "version": "3.1.2",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
+          "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
+          "dev": true,
+          "requires": {
+            "brace-expansion": "^1.1.7"
+          }
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     "ripemd160": {
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@@ -5297,6 +5712,12 @@
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       "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc="
     },
+    "supports-preserve-symlinks-flag": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
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+    },
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@@ -5543,6 +5964,12 @@
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       "dev": true
     },
+    "unc-path-regex": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/unc-path-regex/-/unc-path-regex-0.1.2.tgz",
+      "integrity": "sha1-5z3T17DXxe2G+6xrCufYxqadUPo=",
+      "dev": true
+    },
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@@ -5564,17 +5991,23 @@
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-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.7.0.tgz",
-      "integrity": "sha1-a7rwh3UA02vjTsqlhODbn+8DUgk=",
-      "dev": true
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-      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-2.2.1.tgz",
-      "integrity": "sha1-18D6KvXVoaZ/QlPa7pgTLnM/Dxk=",
-      "dev": true
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.6.tgz",
+      "integrity": "sha512-VoC83HWXmCrF6rgkyxS9GHv8W9Q5nhMKho+OadDJGzL2oDYbYEppBaCMH6pFlwLeqj2QS+hhkw2kpXkSdD1JxQ==",
+      "dev": true,
+      "requires": {
+        "sprintf-js": "^1.1.1",
+        "util-deprecate": "^1.0.2"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.2.tgz",
+          "integrity": "sha512-VE0SOVEHCk7Qc8ulkWw3ntAzXuqf7S2lvwQaDLRnUeIEaKNQJzV6BwmLKhOqT61aGhfUMrXeaBk+oDGCzvhcug==",
+          "dev": true
+        }
+      }
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@@ -5695,6 +6128,15 @@
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       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
+    "v8flags": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
+      "integrity": "sha512-mH8etigqMfiGWdeXpaaqGfs6BndypxusHHcv2qSHyZkGEznCd/qAXCWWRzeowtL54147cktFOC4P5y+kl8d8Jg==",
+      "dev": true,
+      "requires": {
+        "homedir-polyfill": "^1.0.1"
+      }
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     "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",
@@ -6490,10 +6932,13 @@
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-      "integrity": "sha1-RgwdoPgQED0DIam2M6+eV15kSG8=",
-      "dev": true
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
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+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
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diff --git a/package.json b/package.json
index 6efe61e..c7cf5fa 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
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     "chai": "^2.2.0",
-    "grunt": "^0.4.5",
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     "grunt-babel": "^5.0.0",
     "grunt-browserify": "^3.7.0",
     "grunt-contrib-uglify": "^0.9.1",