update devDependencies

Author: Foxandxss

package.json

@@ -28,7 +28,7 @@
     "babel-loader": "^6.2.0",
     "babel-preset-es2015": "^6.1.18",
     "css-loader": "^0.23.0",
-    "extract-text-webpack-plugin": "^0.9.1",
+    "extract-text-webpack-plugin": "^1.0.1",
     "file-loader": "^0.8.4",
     "html-webpack-plugin": "^1.6.2",
     "isparta-instrumenter-loader": "^1.0.0",