69bbe89616
`-i` conflicts with `--optional` option.
```
$ bin/6to5/index.js --help | grep "\-i,"
-i, --optional [list] List of optional transformers to enable
-i, --module-ids Insert module id in modules
```
6to5 turns ES6+ code into vanilla ES5, so you can use next generation features today.
For more information view the documentation. For support visit the gitter room.