Update grunt-yabs to 0.5

Author: mar10

package.json

@@ -50,7 +50,7 @@
     "grunt-exec": "~0.4.0",
     "grunt-saucelabs": "~8.1.0",
     "grunt-contrib-watch": "~0.5.3",
-    "grunt-yabs": "^0.4.0",
+    "grunt-yabs": "^0.5.0",
     "grunt-jscs": "^0.7.1"
   },
   "scripts": {