[RN72] Update Babel

Summary:
As part of upgrading to React Native 0.72, react-native-upgrade-helper prompts us to update Babel.

Realized I forgot to do this as part of my stack yesterday.

Test Plan:

1. I ran web, landing, and keyserver in both prod and dev and clicked around to confirm things were working
2. I built and ran iOS and Android locally and confirmed things work

Reviewers: atul

Reviewed By: atul

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D10553