[native] Update to react-native@0.63.4

Summary: New point release, link to CHANGELOG.

Test Plan: yarn cleaninstall, recompile both iOS and Android, make sure it works

Reviewers: KatPo, palys-swm

Reviewed By: KatPo, palys-swm

Subscribers: zrebcu411, Adrian

Differential Revision: https://phabricator.ashoat.com/D457