fix(webpack): turn off function inlining to avoid const reassignment

Due to a bug in UglifyJS (mishoo/UglifyJS#2842)
we should disable function inlining to avoid falling into this issue.

the uglifyjs-webpack-plugin module is considering to move to the
maintained fork of UglifyJS (terser: https://github.com/fabiosantoscode/terser):
- webpack-contrib/uglifyjs-webpack-plugin#264
- webpack-contrib/uglifyjs-webpack-plugin#296

But until that happens I'd propose to disable function inlining.

Author: ZauberNerd

packages/webpack/lib/configs/build.js

@@ -118,7 +118,12 @@ module.exports = function getConfig(config, configureBuild) {
           parallel: true,
           sourceMap: true,
           uglifyOptions: {
-            output: { comments: false },
+            compress: {
+              inline: 1, // https://github.com/mishoo/UglifyJS2/issues/2842
+            },
+            output: {
+              comments: false,
+            },
           },
         }),
       ],