Update webpack to 3.4.0

package.json

@@ -48,16 +48,16 @@
     "@types/socket.io": "^1.4.29",
     "@types/socket.io-client": "^1.4.29",
     "@types/three": "^0.84.15",
-    "@types/webpack": "^2.2.6",
-    "@types/webpack-dev-middleware": "^1.9.1",
+    "@types/webpack": "^3.0.5",
+    "@types/webpack-dev-middleware": "^1.9.2",
     "@types/webpack-hot-middleware": "^2.15.0",
     "awesome-typescript-loader": "^3.2.1",
     "babel-core": "^6.25.0",
     "babel-loader": "^7.1.1",
     "babel-preset-es2015": "^6.24.1",
     "copy-webpack-plugin": "^4.0.1",
     "css-loader": "^0.28.4",
-    "extract-text-webpack-plugin": "^2.1.2",
+    "extract-text-webpack-plugin": "^3.0.0",
     "file-loader": "^0.11.2",
     "html-loader": "^0.4.4",
     "html-webpack-plugin": "^2.29.0",
@@ -85,9 +85,9 @@
     "tslint-eslint-rules": "^4.1.1",
     "typescript": "^2.4.0",
     "url-loader": "^0.5.9",
-    "webpack": "^2.2.1",
+    "webpack": "^3.4.0",
     "webpack-dev-middleware": "^1.11.0",
-    "webpack-dev-server": "^2.5.1",
+    "webpack-dev-server": "^2.6.1",
     "webpack-hot-middleware": "^2.18.2"
   },
   "dependencies": {