Return license field to package.json

[igoradamenko]

Description

I'm returning the license field to package.json as we discussed in #150.

I've also beautified the package.json. Not sure that it was needed though, maybe it was necessary to keep it as a one line.

Checklist

Please make sure the items below have been covered before requesting a review:

• [ ] This change works and has been tested locally (or has an appropriate fallback).
• [ ] This change has relevant unit tests.
• [ ] This change has relevant documentation additions / updates (if applicable).

(I have not run tests, so it would be fair not to check those checkboxes.)

Deploy Notes

Nothing here.

Steps to Test or Reproduce

Example:

1. Pull down PR.
2. Open package.json.
3. Verify the license field is there.

[igoradamenko]

The build is broken, but it does not look like my change is the reason 🤔

[chrean]

It wasn't your change, master seems to be broken since we reverted 0.3.6. 😢