Add licenses to sub packages

[honzajavorek]

Fix #1744. Not sure how to trigger patch release, couldn't find any contributing docs. Please advise.

Replaces #1745

[ljharb]

This isn't really necessary; the SPDX-compliant "license" field in package.json notes that it's MIT, and that's sufficient due to https://github.com/airbnb/javascript/blob/master/LICENSE.md.

However, this seems fine.

[honzajavorek]

@ljharb Thank you! While I'm no lawyer myself, I think although the package is a product of the repository with a license text, it is still necessary to accompany the package with a full license text, as it is distributed separately. And the MIT license requires the full license text to be alongside the code. Will link this as well: babel/babel#7308 (comment)

[honzajavorek]

@ljharb btw, are you planning a new release?

[ljharb]

The next release will be breaking (due to other merged changes); I’m not going to backport a patch release just for this.

[ljharb]

Separately, the point of a SPDX-compliant identifier, as i understand it, is that the license text is no longer relevant or needed because it is uniquely identified by the license identifier (which implies license text). Maybe @kemitchell can confirm, or correct me if I’m wrong?

[honzajavorek]

I’m not going to backport a patch release just for this.

I didn't think of it like that. It was more like whether you have an idea when the next release might happen.

[ljharb]

No idea, but hopefully soon.