TabBarItem - fontFamily not respected

[gezquinndesign]

I've added a custom font to my app. That font is available and used by other react-native components but not navigation's TabBarItem component. I'm using the fontFamily prop to set the font, but it does not change. Repo can be found here: https://github.com/gezquinndesign/rn-monorepo.

[grahammendick]

Thanks. It turns out that since iOS 13 the TabBarItem font props stopped working. In iOS 13, UIKit changed the way TabBars are configured. Let me know if you want to work on the PR otherwise I'm happy to fix it

[gezquinndesign]

Thanks for fixing! 👍