diff --git a/package-lock.json b/package-lock.json
index 31ccf47..a778939 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,12 +34,12 @@
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       "dev": true,
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+        "color-convert": "^2.0.1"
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@@ -59,12 +59,54 @@
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+      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
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@@ -95,6 +137,67 @@
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+      "resolved": "https://registry.npmjs.org/base/-/base-0.11.2.tgz",
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+          "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
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+          "dev": true,
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+          "resolved": "https://registry.npmjs.org/is-descriptor/-/is-descriptor-1.0.2.tgz",
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+          "dev": true,
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+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.3.tgz",
+          "integrity": "sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==",
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@@ -152,6 +255,35 @@
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+      "integrity": "sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==",
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+        "array-unique": "^0.3.2",
+        "extend-shallow": "^2.0.1",
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+        "isobject": "^3.0.1",
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@@ -182,6 +314,23 @@
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+      "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
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+      "dev": true,
+      "requires": {
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+        "component-emitter": "^1.2.1",
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+        "isobject": "^3.0.1",
+        "set-value": "^2.0.0",
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+        "union-value": "^1.0.0",
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@@ -215,14 +364,36 @@
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-        "ansi-styles": "^3.2.1",
-        "escape-string-regexp": "^1.0.5",
-        "supports-color": "^5.3.0"
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
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+      "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
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+      "dev": true,
+      "requires": {
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+        "define-property": "^0.2.5",
+        "isobject": "^3.0.0",
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+          "dev": true,
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@@ -246,25 +417,29 @@
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-      "integrity": "sha1-56qDAZF+9iGzXYo580jc3R234z4=",
-      "dev": true
+    "collection-visit": {
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+      "dev": true,
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@@ -282,6 +457,12 @@
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@@ -348,14 +535,10 @@
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-      "dev": true,
-      "requires": {
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-        "meow": "^3.3.0"
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@@ -378,12 +561,65 @@
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@@ -1901,12 +3162,64 @@
         "util-deprecate": "^1.0.2"
       }
     },
+    "union-value": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
+      "dev": true,
+      "requires": {
+        "arr-union": "^3.1.0",
+        "get-value": "^2.0.6",
+        "is-extendable": "^0.1.1",
+        "set-value": "^2.0.1"
+      }
+    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=",
       "dev": true
     },
+    "unset-value": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
+      "integrity": "sha1-g3aHP30jNRef+x5vw6jtDfyKtVk=",
+      "dev": true,
+      "requires": {
+        "has-value": "^0.3.1",
+        "isobject": "^3.0.0"
+      },
+      "dependencies": {
+        "has-value": {
+          "version": "0.3.1",
+          "resolved": "https://registry.npmjs.org/has-value/-/has-value-0.3.1.tgz",
+          "integrity": "sha1-ex9YutpiyoJ+wKIHgCVlSEWZXh8=",
+          "dev": true,
+          "requires": {
+            "get-value": "^2.0.3",
+            "has-values": "^0.1.4",
+            "isobject": "^2.0.0"
+          },
+          "dependencies": {
+            "isobject": {
+              "version": "2.1.0",
+              "resolved": "https://registry.npmjs.org/isobject/-/isobject-2.1.0.tgz",
+              "integrity": "sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=",
+              "dev": true,
+              "requires": {
+                "isarray": "1.0.0"
+              }
+            }
+          }
+        },
+        "has-values": {
+          "version": "0.1.4",
+          "resolved": "https://registry.npmjs.org/has-values/-/has-values-0.1.4.tgz",
+          "integrity": "sha1-bWHeldkd/Km5oCCJrThL/49it3E=",
+          "dev": true
+        }
+      }
+    },
     "uri-path": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/uri-path/-/uri-path-1.0.0.tgz",
@@ -1919,12 +3232,27 @@
       "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
       "dev": true
     },
+    "use": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
+      "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
+      "dev": true
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
       "dev": true
     },
+    "v8flags": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.1.3.tgz",
+      "integrity": "sha512-amh9CCg3ZxkzQ48Mhcb8iX7xpAfYJgePHxWMQCBWECpOSqJUXgY26ncA61UTV0BkPqfhcy6mzwCIoP4ygxpW8w==",
+      "dev": true,
+      "requires": {
+        "homedir-polyfill": "^1.0.1"
+      }
+    },
     "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 697270d..c749715 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   ],
   "version": "5.0.9",
   "devDependencies": {
-    "grunt": "~1.0.1",
+    "grunt": "~1.3.0",
     "grunt-autoprefixer": "~3.0.4",
     "grunt-contrib-clean": "~1.0.0",
     "grunt-contrib-cssmin": "~1.0.0",