message: WIP watch mode
diff: const rollup = require('rollup'); // "import" is not working for some reason...
  import rollupConfig from './rollup.config';
  +import { Command } from 'commander';
  +import { run } from '../../helpers/run';
  -export default async () => {
  +export default async (cmd: Command) => {
  const inputOptions = {
  input: rollupConfig.input,
  plugins: rollupConfig.plugins,
  };
  const outputOptions = rollupConfig.output;
  + if (cmd.watch) {
  + await run('rollup -c -w');
  + // const watchOptions = {
  + // ...inputOptions,
  + // output: [outputOptions],
  + // watch: {
  + // include: ['src/**/*'],
  + // chokidar: true,
  + // },
  + // };
  + // const watcher = rollup.watch(watchOptions);
  + // watcher.on('event', (event: any) => {
  + // process.stdout.write(event);
  + // });
  + } else {
  const bundle = await rollup.rollup(inputOptions);
  await bundle.generate(outputOptions);
  await bundle.write(outputOptions);
  + }
  };
  