chore(package): update karma-webpack to version 3.0.2

Closes #73

Author: greenkeeper[bot]

package.json

@@ -82,7 +82,7 @@
     "karma-safari-launcher": "^1.0.0",
     "karma-sauce-launcher": "^1.1.0",
     "karma-spec-reporter": "0.0.31",
-    "karma-webpack": "^2.0.2",
+    "karma-webpack": "^3.0.2",
     "less": "^2.7.2",
     "less-loader": "^4.0.0",
     "mocha": "^3.2.0",