Update npm dev dependencies

package.json

@@ -19,21 +19,21 @@
   "devDependencies": {
     "assemble": "~0.4.37",
     "grunt": "~0.4.5",
-    "grunt-contrib-clean": "~0.5.0",
-    "grunt-contrib-compress": "~0.9.1",
-    "grunt-contrib-concat": "~0.4.0",
-    "grunt-contrib-connect": "~0.7.1",
-    "grunt-contrib-copy": "~0.5.0",
-    "grunt-contrib-cssmin": "^0.9.0",
-    "grunt-contrib-jshint": "^0.10.0",
+    "grunt-contrib-clean": "~0.6.0",
+    "grunt-contrib-compress": "~0.13.0",
+    "grunt-contrib-concat": "~0.5.1",
+    "grunt-contrib-connect": "~0.10.1",
+    "grunt-contrib-copy": "~0.8.0",
+    "grunt-contrib-cssmin": "^0.12.3",
+    "grunt-contrib-jshint": "^0.11.2",
     "grunt-contrib-qunit": ">=0.2.1",
-    "grunt-contrib-uglify": "^0.4.0",
+    "grunt-contrib-uglify": "^0.9.1",
     "grunt-contrib-watch": "^0.6.1",
     "grunt-gh-pages": "^0.10.0",
-    "grunt-jscs-checker": "~0.4.2",
-    "grunt-sass": "^0.18.1",
-    "load-grunt-tasks": "^0.4.0",
-    "pretty": "^0.1.2"
+    "grunt-jscs": "~1.8.0",
+    "grunt-sass": "^1.0.0",
+    "load-grunt-tasks": "^3.2.0",
+    "pretty": "^1.0.0"
   },
   "engines": {
     "node": "~0.10.28"