Add main package.json field

[remziatay]

Default value of main field is index.js, but no such file is exported. This confuses some resolvers, causing them to throw errors on imports directly from wc-context. Adding correct main file to package fixes this issue

Note: This was not a problem on v0.10

[blikblum]

I migrated the package to use exports: https://nodejs.org/api/packages.html#exports

It should be supported by major bundlers by now.

What build tool are you using?

[remziatay]

It's an eslint plugin eslint-plugin-import. Maybe I should report it there then?

[blikblum]

Maybe I should report it there then?

Probably

Anyway, i will add this field that should be ignored by modern tools anyway

[blikblum]

There's already an issue: import-js/eslint-plugin-import#1810

[blikblum]

The core issue is in: browserify/resolve#222

[remziatay]

Thank you!