chore(dep): add grunt bumper

Author: douglasduteil

package.json

@@ -16,7 +16,8 @@
     "grunt-contrib-copy": "~0.4.1",
     "grunt-contrib-connect": "~0.5.0",
     "load-grunt-tasks": "~0.2.0",
-    "grunt-conventional-changelog": "~1.0.0"
+    "grunt-conventional-changelog": "~1.0.0",
+    "grunt-bump": "0.0.11"
   },
   "scripts": {},
   "repository": {