Update grunt dependencies

Author: aarranz

package.json

@@ -2,14 +2,14 @@
   "description": "This package.json file is only used for installing npm dependencies. But this is not an installable node package, but a WireCloud operator. Take a look into src/config.xml for more details about this operator",
   "devDependencies": {
     "bower": "^1.3.12",
-    "grunt": "^0.4.5",
+    "grunt": "^1.0.1",
     "grunt-bower-task": "^0.4.0",
-    "grunt-contrib-clean": "~0.6.0",
-    "grunt-contrib-compress": "^0.11.0",
+    "grunt-contrib-clean": "^1.1.0",
+    "grunt-contrib-compress": "^1.4.3",
     "grunt-contrib-copy": "^0.8.0",
     "grunt-coveralls": "^1.0.1",
     "grunt-karma": "^2.0.0",
-    "grunt-strip-code": "^0.1.2",
+    "grunt-strip-code": "^1.0.6",
     "grunt-text-replace": "~0.4.0",
     "grunt-wirecloud": "^0.9.0",
     "gruntify-eslint": "^3.1.0",