fix(build): don't include babel runtime (#2590)

Author: pi0

babel.config.js

@@ -7,8 +7,10 @@ module.exports = {
       }
     ]
   ],
-  plugins: ['@babel/proposal-object-rest-spread', '@babel/transform-runtime'],
   env: {
+    es: {
+      plugins: [['@babel/plugin-transform-modules-commonjs', { noInterop: true, loose: true }]]
+    },
     test: {
       presets: [
         [

scripts/build

@@ -10,7 +10,7 @@ echo 'Done.'
 echo ''
 
 echo 'Build ES modules...'
-npx babel src --out-dir es --ignore 'src/**/*/fixtures,src/**/*.spec.js'
+NODE_ENV=es babel src --out-dir es --ignore 'src/**/*/fixtures,src/**/*.spec.js'
 echo 'Done.'
 echo ''