chore(webpack): add source maps (#4471)

* chore(webpack): add source maps

* feat(build): fetch source maps for 3rd party libs

webpack/webpack.common.js

@@ -19,6 +19,11 @@ module.exports = {
   },
   module: {
     rules: [
+      {
+        test: /\.js$/,
+        enforce: 'pre',
+        use: ['source-map-loader'],
+      },
       {
         test: /\.js$/,
         exclude: /node_modules/,

webpack/webpack.develop.js

@@ -4,6 +4,7 @@ const commonConfig = require('./webpack.common.js');
 
 module.exports = webpackMerge(commonConfig, {
   mode: 'development',
+  devtool: 'eval-source-map',
   module: {
     rules: [
       {

webpack/webpack.production.js

@@ -3,6 +3,7 @@ const commonConfig = require('./webpack.common.js');
 
 module.exports = webpackMerge(commonConfig, {
   mode: 'production',
+  devtool: 'source-map',
   module: {
     rules: [
       {