Revert "build(deps-dev): bump webpack-dev-server from 3.2.1 to 3.3.1"

This reverts commit beaa1f5.

Until webpack/webpack-dev-server#1777 is fixed.

Author: david-yz-liu

package.json

@@ -19,6 +19,6 @@
     "react-tabs": "^3.0.0"
   },
   "devDependencies": {
-    "webpack-dev-server": "3.3.1"
+    "webpack-dev-server": "3.2.1"
   }
 }