diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 50fc9f8..6389fa7 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -96,11 +96,21 @@
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@@ -2359,6 +2709,15 @@
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@@ -2538,6 +2899,34 @@
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       "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
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+      "resolved": "https://registry.npmjs.org/object.defaults/-/object.defaults-1.1.0.tgz",
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+        "array-slice": "^1.0.0",
+        "for-own": "^1.0.0",
+        "isobject": "^3.0.0"
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+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/object.map/-/object.map-1.0.1.tgz",
+      "integrity": "sha512-3+mAJu2PLfnSVGHwIWubpOFLscJANBKuB/6A4CxBstc4aqwQY0FWcsppuy4jU5GSB95yES5JHSI+33AWuS4k6w==",
+      "requires": {
+        "for-own": "^1.0.0",
+        "make-iterator": "^1.0.0"
+      }
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+    "object.pick": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/object.pick/-/object.pick-1.3.0.tgz",
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       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -2579,11 +2968,30 @@
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       "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ="
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+    "osenv": {
+      "version": "0.1.5",
+      "resolved": "https://registry.npmjs.org/osenv/-/osenv-0.1.5.tgz",
+      "integrity": "sha512-0CWcCECdMVc2Rw3U5w9ZjqX6ga6ubk1xDVKxtBQPK7wis/0F2r9T6k4ydGYhecl7YUBxBVxhL5oisPsNxAPe2g==",
+      "requires": {
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+        "os-tmpdir": "^1.0.0"
+      }
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       "resolved": "https://registry.npmjs.org/pako/-/pako-0.2.9.tgz",
       "integrity": "sha1-8/dSL073gjSNqBYbrZ7P1Rv4OnU="
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+    "parse-filepath": {
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+      "resolved": "https://registry.npmjs.org/parse-filepath/-/parse-filepath-1.0.2.tgz",
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+      "requires": {
+        "is-absolute": "^1.0.0",
+        "map-cache": "^0.2.0",
+        "path-root": "^0.1.1"
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       "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-2.2.0.tgz",
@@ -2592,6 +3000,11 @@
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+    "parse-passwd": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/parse-passwd/-/parse-passwd-1.0.0.tgz",
+      "integrity": "sha512-1Y1A//QUXEZK7YKz+rD9WydcE1+EuPr6ZBgKecAB8tmoW6UFv0NREVJe1p+jRxtThkcbbKkfwIbWJe/IeE6m2Q=="
+    },
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       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-2.1.0.tgz",
@@ -2616,6 +3029,19 @@
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+    "path-root": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/path-root/-/path-root-0.1.1.tgz",
+      "integrity": "sha512-QLcPegTHF11axjfojBIoDygmS2E3Lf+8+jI6wOVmNVenrKSo3mFdSGiIgdSHenczw3wPtlVMQaFVwGmM7BJdtg==",
+      "requires": {
+        "path-root-regex": "^0.1.0"
+      }
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+    "path-root-regex": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/path-root-regex/-/path-root-regex-0.1.2.tgz",
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       "resolved": "https://registry.npmjs.org/path-type/-/path-type-1.1.0.tgz",
@@ -2632,6 +3058,11 @@
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+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA=="
+    },
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       "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
@@ -2773,6 +3204,14 @@
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       }
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+    "rechoir": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/rechoir/-/rechoir-0.7.1.tgz",
+      "integrity": "sha512-/njmZ8s1wVeR6pjTZ+0nCnv8SpZNRMT2D1RLOJQESlYFDBvwpTA4KWJpZ+sBJ4+vhjILRcK7JIFdGCdxEAAitg==",
+      "requires": {
+        "resolve": "^1.9.0"
+      }
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       "resolved": "https://registry.npmjs.org/redent/-/redent-1.0.0.tgz",
@@ -2886,6 +3325,15 @@
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+    "resolve-dir": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/resolve-dir/-/resolve-dir-1.0.1.tgz",
+      "integrity": "sha512-R7uiTjECzvOsWSfdM0QKFNBVFcK27aHOUwdvK53BcW8zqnGdYp0Fbj82cy54+2A4P2tFM22J5kRfe1R+lM/1yg==",
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+        "expand-tilde": "^2.0.0",
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       "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-1.0.1.tgz",
@@ -3148,6 +3596,11 @@
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       "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc="
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+    "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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@@ -3247,6 +3700,14 @@
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       "integrity": "sha1-uDVx+k2MJbguIxsG46MFXeTKGkc="
     },
+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "requires": {
+        "is-number": "^7.0.0"
+      }
+    },
     "tough-cookie": {
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       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
@@ -3287,7 +3748,8 @@
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-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
+      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
+      "optional": true
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       "version": "0.3.2",
@@ -3312,12 +3774,17 @@
         "source-map": "~0.6.1"
       }
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+    "unc-path-regex": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/unc-path-regex/-/unc-path-regex-0.1.2.tgz",
+      "integrity": "sha512-eXL4nmJT7oCpkZsHZUOJo8hcX3GbsiDOa0Qu9F646fi8dT3XuSVopVqAcEiVzSKKH7UoDti23wNX3qGFxcW5Qg=="
+    },
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-      "version": "3.3.5",
-      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.5.tgz",
-      "integrity": "sha512-g+dpmgn+XBneLmXXo+sGlW5xQEt4ErkS3mgeN2GFbremYeMBSJKr9Wf2KJplQVaiPY/f7FN6atosWYNm9ovrYg==",
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.6.tgz",
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       "requires": {
-        "sprintf-js": "^1.0.3",
+        "sprintf-js": "^1.1.1",
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@@ -3350,6 +3817,14 @@
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+    "v8flags": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
+      "integrity": "sha512-mH8etigqMfiGWdeXpaaqGfs6BndypxusHHcv2qSHyZkGEznCd/qAXCWWRzeowtL54147cktFOC4P5y+kl8d8Jg==",
+      "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",
diff --git a/package.json b/package.json
index 9ef85e8..40f6ef1 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
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     "babel-preset-env": "1.7.0",
     "chalk": "1.1.3",
-    "grunt": "1.0.4",
+    "grunt": "1.5.3",
     "grunt-babel": "7.0.0",
     "grunt-cli": "1.2.0",
     "grunt-contrib-clean": "1.0.0",