Rollup config to transpile LitElement without the need to use custom-es5-adapter

rollup.config.js

import commonjs from 'rollup-plugin-commonjs';
import resolver from 'rollup-plugin-node-resolve';
import babel from 'rollup-plugin-babel';
import multiEntry from 'rollup-plugin-multi-entry';

export default {
  input: [
    require.resolve('regenerator-runtime'), 
    'src/my-component/component.js'
  ],
  output: {
    file: 'dist/bundle.js',
    format: 'iife'
  },
  plugins: [
    commonjs(),
    resolver(),
    multiEntry({
      exports: false
    }),
    babel({
      babelrc: false,
      presets: [
        [
          '@babel/env',
          {
            modules: false,
            targets: {
              browsers: ['ie 11']
            }
          }
        ]
      ]
    })
  ]
};