Update devDependencies.

[ci skip]

Author: XhmikosR

package.json

@@ -31,7 +31,7 @@
     "grunt-contrib-clean": "~1.0.0",
     "grunt-contrib-concat": "~1.0.0",
     "grunt-contrib-jshint": "~1.0.0",
-    "grunt-contrib-watch": "~0.6.1",
+    "grunt-contrib-watch": "~1.0.0",
     "grunt-include-replace": "~3.2.0",
     "load-grunt-tasks": "~3.4.0",
     "time-grunt": "~1.3.0",