Move matchdep from devDependencies to dependencies

Author: alejofernandez

package.json

@@ -20,11 +20,11 @@
     "grunt-contrib-uglify": "^0.5.1",
     "grunt-contrib-watch": "^0.6.1",
     "grunt-mocha-phantomjs": "0.7.0",
-    "grunt-usemin": "^2.0.2"
+    "grunt-usemin": "^2.0.2",
+    "matchdep": "~0.3.0"
   },
   "devDependencies": {
-    "expect.js": "^0.3.1",
-    "matchdep": "~0.3.0"
+    "expect.js": "^0.3.1"
   },
   "scripts": {
     "test": "grunt test --verbose",