Upgrade webpack stack

package.json

@@ -44,7 +44,7 @@
     "babel-preset-react": "^6.24.1",
     "chai": "^4.1.2",
     "cross-env": "^5.1.3",
-    "css-loader": "^0.28.1",
+    "css-loader": "^0.28.9",
     "devtron": "^1.4.0",
     "electron": "1.7.11",
     "electron-builder": "17.4.0",
@@ -56,10 +56,10 @@
     "mocha-circleci-reporter": "0.0.2",
     "npm-run-all": "^4.1.2",
     "spectron": "~3.7.3",
-    "style-loader": "^0.17.0",
+    "style-loader": "^0.20.1",
     "url-loader": "^0.6.2",
-    "webpack": "^2.5.1",
-    "webpack-dev-server": "^2.5.1",
-    "webpack-merge": "^4.1.0"
+    "webpack": "^3.10.0",
+    "webpack-dev-server": "^2.11.1",
+    "webpack-merge": "^4.1.1"
   }
 }