update webpack

package.json

@@ -85,7 +85,6 @@
     "ejs": "^2.4.1",
     "engine.io-client": "^1.6.7",
     "express-expose": "^0.3.4",
-    "extract-text-webpack-plugin": "^1.0.1",
     "graphiql": "^0.9.3",
     "graphql": "^0.9.2",
     "graphql-server-express": "^0.6.0",
@@ -136,15 +135,15 @@
     "eslint": "^3.19.0",
     "eslint-plugin-react": "^3.16.1",
     "express": "^4.13.3",
-    "extract-text-webpack-plugin": "^2.1.0",
+    "extract-text-webpack-plugin": "^3.0.2",
     "gsap": "^1.18.2",
     "html-webpack-plugin": "^1.6.1",
     "jscs": "^2.1.1",
     "jsdom": "^6.5.1",
     "json-loader": "^0.5.3",
     "mocha": "^2.3.3",
     "mocha-jsdom": "^1.0.0",
-    "node-sass": "^3.4.2",
+    "node-sass": "^4.7.2",
     "null-loader": "^0.1.1",
     "postcss-loader": "^0.6.0",
     "react-addons-test-utils": "^15.4.2",
@@ -153,14 +152,14 @@
     "react-transform-hmr": "^1.0.0",
     "redbox-react": "^1.2.0",
     "rimraf": "^2.4.3",
-    "sass-loader": "^3.1.2",
+    "sass-loader": "^6.0.6",
     "sinon": "^1.16.1",
     "sinon-chai": "^2.8.0",
     "stats-webpack-plugin": "^0.6.0",
     "style-loader": "^0.16.1",
-    "webpack": "^2.3.3",
-    "webpack-dev-middleware": "^1.2.0",
-    "webpack-dev-server": "^2.4.2",
+    "webpack": "^3.10.0",
+    "webpack-dev-middleware": "^1.12.2",
+    "webpack-dev-server": "^2.9.7",
     "webpack-hot-middleware": "^2.2.0",
     "write-file-webpack-plugin": "^4.0.0"
   }