JLi

Yeah I was still working on making all the changes sorry. Just wanted to make the draft pull request and make changes as I go. I've made the changes to...

@humphd for the migration, Parcel 2 doesn't use the `--out-file` CLI option anymore as described [here](https://parceljs.org/getting-started/migration/#--out-file). But I'm not really 100% sure if I'm doing it correctly at [lines 18-19](https://github.com/filerjs/filer/blob/7d10e3414b25df3fdfaceb4c47af463274d0ca79/package.json#L18-L19)...

Yeah after reading the documentation and messing around with the package.json, I still couldn't figure out why it needed for these built-in node modules to be added to the dependencies....

Hi, I would like to take a shot at fixing this issue.