diff --git a/package-lock.json b/package-lock.json
index 34dc4ae..1cc3c74 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,7 +31,7 @@
         "sprintf-js": {
           "version": "1.0.3",
           "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
-          "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+          "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
           "dev": true
         }
       }
@@ -49,9 +49,9 @@
       "dev": true
     },
     "async": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.0.tgz",
-      "integrity": "sha512-TR2mEZFVOj2pLStYxLht7TyfuRzaydfpxr3k9RpHIzMgw7A64dzsdqCxH1WJyQdoe8T10nDXd9wnEigmiuHIZw==",
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
+      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ==",
       "dev": true
     },
     "balanced-match": {
@@ -113,7 +113,7 @@
     "colors": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/colors/-/colors-1.1.2.tgz",
-      "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
+      "integrity": "sha512-ENwblkFQpqqia6b++zLD/KUWafYlVY/UNnAp7oz7LY7E924wmpye416wBOmvv/HMWzl8gL1kJlfvId/1Dg176w==",
       "dev": true
     },
     "concat-map": {
@@ -123,9 +123,9 @@
       "dev": true
     },
     "dateformat": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-3.0.3.tgz",
-      "integrity": "sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==",
+      "version": "4.6.3",
+      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-4.6.3.tgz",
+      "integrity": "sha512-2P0p0pFGzHS5EMnhdxQi7aJN+iMheud0UhG4dlE1DLAlvL8JHjJJTX/CSm4JXwV0Ka5nGk3zC5mcb5bUQUxxMA==",
       "dev": true
     },
     "detect-file": {
@@ -197,25 +197,24 @@
       }
     },
     "findup-sync": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-0.3.0.tgz",
-      "integrity": "sha1-N5MKpdgWt3fANEXhlmzGeQpMCxY=",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-5.0.0.tgz",
+      "integrity": "sha512-MzwXju70AuyflbgeOhzvQWAvvQdo1XL0A9bVvlXsYcFEBM87WR4OakL4OfZq+QRmr+duJubio+UtNQCPsVESzQ==",
       "dev": true,
       "requires": {
-        "glob": "~5.0.0"
+        "detect-file": "^1.0.0",
+        "is-glob": "^4.0.3",
+        "micromatch": "^4.0.4",
+        "resolve-dir": "^1.0.1"
       },
       "dependencies": {
-        "glob": {
-          "version": "5.0.15",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
-          "integrity": "sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=",
+        "is-glob": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
+          "integrity": "sha512-xelSayHH36ZgE7ZWhli7pW34hNbNl8Ojv5KVmkJD4hBdD3th8Tfk9vYasLM+mXWOZhFkgZfxhLSnrwRr4elSSg==",
           "dev": true,
           "requires": {
-            "inflight": "^1.0.4",
-            "inherits": "2",
-            "minimatch": "2 || 3",
-            "once": "^1.3.0",
-            "path-is-absolute": "^1.0.0"
+            "is-extglob": "^2.1.1"
           }
         }
       }
@@ -267,9 +266,9 @@
       "dev": true
     },
     "getobject": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/getobject/-/getobject-1.0.1.tgz",
-      "integrity": "sha512-tj18lLe+917AACr6BdVoUuHnBPTVd9BEJp1vxnMZ58ztNvuxz9Ufa+wf3g37tlGITH35jggwZ2d9lcgHJJgXfQ==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/getobject/-/getobject-1.0.2.tgz",
+      "integrity": "sha512-2zblDBaFcb3rB4rF77XVnuINOE2h2k/OnqXAiy0IrTxUfV1iFp3la33oAQVY9pCpWU268WFYVt2t71hlMuLsOg==",
       "dev": true
     },
     "gettext-parser": {
@@ -333,26 +332,24 @@
       }
     },
     "grunt": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.4.1.tgz",
-      "integrity": "sha512-ZXIYXTsAVrA7sM+jZxjQdrBOAg7DyMUplOMhTaspMRExei+fD0BTwdWXnn0W5SXqhb/Q/nlkzXclSi3IH55PIA==",
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.6.1.tgz",
+      "integrity": "sha512-/ABUy3gYWu5iBmrUSRBP97JLpQUm0GgVveDCp6t3yRNIoltIYw7rEj3g5y1o2PGPR2vfTRGa7WC/LZHLTXnEzA==",
       "dev": true,
       "requires": {
-        "dateformat": "~3.0.3",
+        "dateformat": "~4.6.2",
         "eventemitter2": "~0.4.13",
         "exit": "~0.1.2",
-        "findup-sync": "~0.3.0",
+        "findup-sync": "~5.0.0",
         "glob": "~7.1.6",
-        "grunt-cli": "~1.4.2",
+        "grunt-cli": "~1.4.3",
         "grunt-known-options": "~2.0.0",
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
-        "iconv-lite": "~0.4.13",
+        "iconv-lite": "~0.6.3",
         "js-yaml": "~3.14.0",
         "minimatch": "~3.0.4",
-        "mkdirp": "~1.0.4",
-        "nopt": "~3.0.6",
-        "rimraf": "~3.0.2"
+        "nopt": "~3.0.6"
       },
       "dependencies": {
         "grunt-cli": {
@@ -717,12 +714,12 @@
       "dev": true
     },
     "iconv-lite": {
-      "version": "0.4.24",
-      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
-      "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
+      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
       "dev": true,
       "requires": {
-        "safer-buffer": ">= 2.1.2 < 3"
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
       }
     },
     "inflight": {
@@ -916,9 +913,9 @@
       }
     },
     "minimatch": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
-      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "version": "3.0.8",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.8.tgz",
+      "integrity": "sha512-6FsRAQsxQ61mw+qP1ZzbL9Bc78x2p5OqNgNpnoAFLTrX8n5Kxph0CsnhmKKNXTWjXqU5L0pGPR7hYk+XWZr60Q==",
       "dev": true,
       "requires": {
         "brace-expansion": "^1.1.7"
@@ -985,7 +982,7 @@
     "nopt": {
       "version": "3.0.6",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz",
-      "integrity": "sha1-xkZdvwirzU2zWTF/eaxopkayj/k=",
+      "integrity": "sha512-4GUt3kSEYmk4ITxzB/b9vaIDfUVWN/Ml1Fwl11IlnIG2iaJ9O6WXZ9SrYM9NLI8OCBieN2Y8SWC2oJV0RQ7qYg==",
       "dev": true,
       "requires": {
         "abbrev": "1"
@@ -1143,15 +1140,6 @@
         "global-modules": "^1.0.0"
       }
     },
-    "rimraf": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
-      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
-      "dev": true,
-      "requires": {
-        "glob": "^7.1.3"
-      }
-    },
     "safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -1247,12 +1235,12 @@
       "dev": true
     },
     "underscore.string": {
-      "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",
+      "integrity": "sha512-VoC83HWXmCrF6rgkyxS9GHv8W9Q5nhMKho+OadDJGzL2oDYbYEppBaCMH6pFlwLeqj2QS+hhkw2kpXkSdD1JxQ==",
       "dev": true,
       "requires": {
-        "sprintf-js": "^1.0.3",
+        "sprintf-js": "^1.1.1",
         "util-deprecate": "^1.0.2"
       }
     },
diff --git a/package.json b/package.json
index b2a422a..b2fd16d 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "main": "Gruntfile.js",
   "author": "YOUR NAME HERE",
   "devDependencies": {
-    "grunt": "^1.4.1",
+    "grunt": "^1.6.1",
     "grunt-wp-i18n": "~1.0.3",
     "grunt-wp-readme-to-markdown": "~2.0.1"
   }