Update dev dependencies

Author: lucor

package.json

@@ -25,16 +25,16 @@
     "webcomponent"
   ],
   "devDependencies": {
-    "chai": "^3.5.0",
+    "chai": "^4.1.0",
     "gulp": "^3.9.1",
     "gulp-bower": "^0.0.13",
-    "http-server": "^0.9",
-    "karma": "^0.13",
+    "http-server": "^0.10",
+    "karma": "^1.7.0",
     "karma-chai": "^0.1",
-    "karma-mocha": "^0.2",
+    "karma-mocha": "^1.3.0",
     "karma-phantomjs-launcher": "^1.0",
-    "phantomjs-prebuilt": "^2.1.3",
-    "mocha": "^2.4.5"
+    "mocha": "^3.4.2",
+    "phantomjs-prebuilt": "^2.1.3"
   },
   "scripts": {
     "postinstall": "bower install",