Add react-native field to pkg.json

[Andarist]

fixes #233

It seems that the Metro bundler used by React Native doesn't handle either .mjs nor .cjs - which is somewhat incorrect because files with unknown extensions have always just been loaded as .js in node. Some more info can be found in my comment here as well.

While technically it's not our issue and theirs - it's unknown when this will get fixed on their side and there are React Native consumers confused with this as stylis is not working for them out of the box. I believe that it's best to just fix this on our side for now.

This probably could have also been fixed by reverting this commit: 180b982 . Pick your poison 😉

[coveralls]

Pull Request Test Coverage Report for Build 98b9e6006050626fafbd53b556af8e42aa75e3d2-PR-238

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 243c495aaef2739037c1559bb2f1092bba2ff25f:	0.0%
Covered Lines:	236
Relevant Lines:	236

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💛 - Coveralls

[Andarist]

@thysultan friendly 🏓

[thysultan]

Published patch update to npm. Thanks for the ping.