chore: upgrade webpack-dev-server to 3.4.1 (#4020)

Payton Burdette · haoqunjiang · commit fa7c1aa02d47 · 2019-05-18T16:45:28.000+08:00
fixes #4016
diff --git a/packages/@vue/cli-service/package.json b/packages/@vue/cli-service/package.json
@@ -75,7 +75,7 @@
     "webpack": ">=4 < 4.29",
     "webpack-bundle-analyzer": "^3.3.2",
     "webpack-chain": "^6.0.0",
-    "webpack-dev-server": "^3.3.1",
+    "webpack-dev-server": "^3.4.1",
     "webpack-merge": "^4.2.1",
     "yorkie": "^2.0.0"
   },
