Update devDpendency

Author: t32k

package.json

@@ -46,13 +46,13 @@
         "csscomb": "~3.0.0"
     },
     "devDependencies": {
-        "grunt-contrib-jshint": "~0.6.0",
-        "grunt-contrib-clean": "~0.4.0",
-        "grunt-contrib-nodeunit": "~0.2.0",
-        "grunt": "~0.4.2"
+        "grunt": "^0.4.5",
+        "grunt-contrib-clean": "^0.4.0",
+        "grunt-contrib-jshint": "^0.10.0",
+        "grunt-contrib-nodeunit": "^0.4.0"
     },
     "peerDependencies": {
-        "grunt": "~0.4.2"
+        "grunt": "^0.4.5"
     },
     "keywords": [
         "gruntplugin",