chore!: upgrade terser-webpack-plugin to 2.x (#4676)

haoqunjiang · web-flow · commit 08d776109980 · 2019-10-11T14:51:20.000+08:00
BREAKING CHANGE: The only real breaking change is webpack-contrib/terser-webpack-plugin#129, which is not likely to affect normal users. The rest are default option values changes, which are already covered in the default provided `terserOptions` of Vue CLI. Note that here we choose to disable `extractComments` by default, as I don't see enough data showing such license comments taking too much space. The extra LICENSE file may also be confusing to some users.
diff --git a/packages/@vue/cli-service/lib/config/terserOptions.js b/packages/@vue/cli-service/lib/config/terserOptions.js
@@ -37,5 +37,6 @@ module.exports = options => ({
   },
   sourceMap: options.productionSourceMap,
   cache: true,
-  parallel: options.parallel
+  parallel: options.parallel,
+  extractComments: false
 })
diff --git a/packages/@vue/cli-service/package.json b/packages/@vue/cli-service/package.json
@@ -69,7 +69,7 @@
     "source-map-url": "^0.4.0",
     "ssri": "^6.0.1",
     "string.prototype.padend": "^3.0.0",
-    "terser-webpack-plugin": "^1.3.0",
+    "terser-webpack-plugin": "^2.1.2",
     "thread-loader": "^2.1.2",
     "url-loader": "^2.1.0",
     "vue-loader": "^15.7.0",
diff --git a/yarn.lock b/yarn.lock
