dependency version bump

Author: Rayman

package.json

@@ -14,28 +14,30 @@
     "./src/util/decompressPng.js": "./src/util/shim/decompressPng.js"
   },
   "devDependencies": {
-    "grunt": "~0.4.1",
-    "grunt-browserify": "^3.0.1",
+    "chai": "^3.3.0",
+    "grunt": "^0.4.1",
+    "grunt-browserify": "^4.0.1",
     "grunt-cli": "^0.1.13",
-    "grunt-contrib-clean": "~0.4.0",
-    "grunt-contrib-jshint": "^0.10.0",
-    "grunt-contrib-uglify": "~0.2.0",
-    "grunt-contrib-watch": "~0.3.1",
-    "grunt-jsdoc": "~0.6.0",
+    "grunt-contrib-clean": "^0.6.0",
+    "grunt-contrib-jshint": "^0.11.3",
+    "grunt-contrib-uglify": "^0.9.2",
+    "grunt-contrib-watch": "^0.6.1",
+    "grunt-jsdoc": "^0.6.0",
     "grunt-karma": "^0.12.0",
-    "grunt-mocha-test": "^0.11.0",
+    "grunt-mocha-test": "^0.12.7",
     "karma": "^0.13.9",
     "karma-chai": "^0.1.0",
-    "karma-firefox-launcher": "~0.1.3",
-    "karma-mocha": "^0.1.9",
-    "load-grunt-tasks": "^0.6.0",
+    "karma-firefox-launcher": "^0.1.3",
+    "karma-mocha": "^0.2.0",
+    "load-grunt-tasks": "^3.3.0",
+    "mocha": "^2.3.3",
     "time-grunt": "^1.0.0"
   },
   "dependencies": {
-    "eventemitter2": "~0.4.13",
-    "object-assign": "^2.0.0",
+    "eventemitter2": "^0.4.13",
+    "object-assign": "^4.0.1",
     "pngparse": "^2.0.1",
-    "ws": "^0.4.32",
+    "ws": "^0.8.0",
     "xmldom": "^0.1.19"
   },
   "directories": {