Upgrade grunt dependencies

issue8316
review263401003

package.json

@@ -36,23 +36,23 @@
     "postinstall": "./node_modules/.bin/bower install"
   },
   "devDependencies": {
-    "grunt-contrib-nodeunit": "^0.4",
-    "grunt-contrib-qunit": "^1.2",
-    "grunt-contrib-watch": "^0.6",
-    "grunt-shell": "^1.2",
-    "grunt-xgettext": "^0.3"
+    "grunt-contrib-nodeunit": "^2.0",
+    "grunt-contrib-qunit": "^3.1",
+    "grunt-contrib-watch": "^1.1",
+    "grunt-shell": "^3.0",
+    "grunt-xgettext": "^0.3",
+    "grunt-po2json": "^0.3"
   },
   "keywords": [
     "tryton"
   ],
   "dependencies": {
     "bower": "^1.8.4",
-    "grunt": "^0.4",
-    "grunt-cli": "^0.1",
-    "grunt-contrib-concat": "^0.5",
-    "grunt-contrib-jshint": "^0.11",
-    "grunt-contrib-less": "^1.2",
-    "grunt-contrib-uglify": "^0.9",
-    "grunt-po2json": "^0.3"
+    "grunt": "^1.0",
+    "grunt-cli": "^1.3",
+    "grunt-contrib-concat": "^1.0",
+    "grunt-contrib-jshint": "^2.1",
+    "grunt-contrib-less": "^2.0",
+    "grunt-contrib-uglify": "^4.0"
   }
 }