Modernize packed code

Fixes #392

Author: orgads

babel.config.json

@@ -17,7 +17,7 @@
     [
       "@babel/preset-env",
       {
-        "forceAllTransforms": true,
+        "targets": "> 1%, not dead",
         "modules": "commonjs"
       }
     ],

webpack.config.js

@@ -37,5 +37,5 @@ module.exports = {
       transform: (_, opts) => JSON.stringify(opts.compiler.getStats().toJson({ chunkModules: true }), null, 2)
     })
   ],
-  target: ['web', 'es5']
+  target: ['web', 'es2019']
 };