switch from ^ to ~ since dependencies are all pre-1.0

Author: cvrebert

package.json

@@ -28,12 +28,12 @@
     "css-flip": "~0.3.0"
   },
   "devDependencies": {
-    "grunt-contrib-jshint": "^0.8.0",
-    "grunt-contrib-clean": "^0.5.0",
-    "grunt-contrib-nodeunit": "^0.3.2",
-    "grunt": "^0.4.2",
-    "grunt-jscs-checker": "^0.4.0",
-    "load-grunt-tasks": "^0.4.0"
+    "grunt-contrib-jshint": "~0.8.0",
+    "grunt-contrib-clean": "~0.5.0",
+    "grunt-contrib-nodeunit": "~0.3.2",
+    "grunt": "~0.4.2",
+    "grunt-jscs-checker": "~0.4.0",
+    "load-grunt-tasks": "~0.4.0"
   },
   "peerDependencies": {
     "grunt": "~0.4.2"