Add Conditional exports support

[Gaubee]

see doc

[jakearchibald]

I don't think this is enough, as the file extensions will need to change one way or the other. See jakearchibald/idb-keyval#126

[jakearchibald]

I'm going to try and fix this soon, using whatever solution I come to for idb-keyval

[jakearchibald]

I did this for idb-keyval in jakearchibald/idb-keyval#129. I'm going to leave it for a few days and see if it causes problems for anyone. If not, I'll do the same for this library.

[Feiyang1]

@jakearchibald any update? Love to have the exports support (especially the import condition) to make SSR easier using esm files.

[jakearchibald]

It's still on my radar. I'm happy with how it went with idb-keyval, so just waiting for the free time.

[jakearchibald]

Closing in favour of #242. It's also published as https://www.npmjs.com/package/idb/v/7.0.0-beta. I'd really appreciate some testing and feedback!