refactor: code

Author: alexander-akait

babel.config.js

@@ -10,10 +10,25 @@ module.exports = (api) => {
  '@babel/preset-env',
  {
  targets: {
- node: '10.13.0',
+ node: '8.9.0',
  },
  },
  ],
  ],
+ overrides: [
+ {
+ test: './src/runtime',
+ presets: [
+ [
+ '@babel/preset-env',
+ {
+ targets: {
+ node: '0.12',
+ },
+ },
+ ],
+ ],
+ },
+ ],
  };
 };