Update NPM dependencies

package.json

@@ -1,27 +1,27 @@
 {
   "name": "picturefill",
   "description": "A responsive image polyfill.",
-  "version": "2.2.0",
-  "repo": "https://github.com/scottjehl/picturefill.git",
+  "version": "3.0.0",
+  "repository": "https://github.com/scottjehl/picturefill.git",
   "engines": {
-    "node": ">= 0.8.0"
+    "node": ">= 0.10.0"
   },
   "main": "./dist/picturefill",
   "scripts": {
     "test": "grunt test --verbose"
   },
   "devDependencies": {
-    "grunt": "~0.4.2",
+    "grunt": "~0.4.5",
     "grunt-bytesize": "^0.1.1",
     "grunt-cli": "~0.1",
-    "grunt-contrib-clean": "~0.4.0",
+    "grunt-contrib-clean": "~0.6.0",
     "grunt-contrib-concat": "^0.5.0",
     "grunt-contrib-copy": "^0.7.0",
     "grunt-contrib-jshint": "~0.10.0",
-    "grunt-contrib-qunit": "~0.2.0",
-    "grunt-contrib-uglify": "~0.2.0",
-    "grunt-contrib-watch": "~0.4.0",
-    "grunt-jscs-checker": "~0.4.3",
+    "grunt-contrib-qunit": "~0.5.2",
+    "grunt-contrib-uglify": "~0.7.0",
+    "grunt-contrib-watch": "~0.6.1",
+    "grunt-jscs": "~1.2.0",
     "grunt-max-filesize": "^0.1.0"
   }
 }