chore(dependencies): update dev dependencies

Update dev dependencies for which we can simply
bump up a varsion to the latest

Author: pkozlowski-opensource

Diff for: package.json

@@ -8,16 +8,16 @@
     "grunt": "~0.4.1",
     "grunt-ngdocs": "~0.1.1",
     "grunt-conventional-changelog": "~0.1.2",
-    "grunt-contrib-concat": "~0.1.3",
-    "grunt-contrib-copy": "~0.4.1",
+    "grunt-contrib-concat": "~0.3.0",
+    "grunt-contrib-copy": "~0.5.0",
     "grunt-contrib-uglify": "~0.3.0",
-    "grunt-contrib-watch": "~0.3.1",
-    "grunt-contrib-jshint": "~0.4.0",
-    "grunt-html2js": "~0.1.3",
+    "grunt-contrib-watch": "~0.5.0",
+    "grunt-contrib-jshint": "~0.8.0",
+    "grunt-html2js": "~0.2.0",
     "grunt-karma": "~0.4.4",
     "node-markdown": "0.1.1",
-    "semver": "~1.1.4",
-    "shelljs": "~0.1.4"
+    "semver": "~2.2.0",
+    "shelljs": "~0.2.0"
   },
   "license": "MIT"
 }