Update npm dependencies/package versions

package.json

@@ -76,15 +76,15 @@
     "xmldom": "0.1.27"
   },
   "devDependencies": {
-    "babel-core": "6.25.0",
+    "babel-core": "6.26.0",
     "babel-eslint": "7.2.3",
-    "babel-loader": "7.1.1",
-    "babel-polyfill": "6.23.0",
+    "babel-loader": "7.1.2",
+    "babel-polyfill": "6.26.0",
     "babel-preset-es2015": "6.24.1",
     "babel-preset-react": "6.24.1",
     "babel-preset-stage-1": "6.24.1",
     "clean-css": "3.4.25",
-    "css-loader": "0.28.4",
+    "css-loader": "0.28.5",
     "eslint": "3.19.0",
     "eslint-plugin-flowtype": "2.30.4",
     "eslint-plugin-import": "2.7.0",
@@ -100,8 +100,8 @@
     "precommit-hook": "3.0.0",
     "string-replace-loader": "1.3.0",
     "style-loader": "0.18.2",
-    "webpack": "2.6.1",
-    "webpack-dev-server": "2.6.1"
+    "webpack": "3.5.5",
+    "webpack-dev-server": "2.7.1"
   },
   "engines": {
     "node": ">=6.0.0"