set unified version (#42776)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/42776

Changelog: [Internal] set all monorepo packages (including react-native) to one version and update all inter-dependencies (including the template)

Reviewed By: huntie

Differential Revision: D53251917

fbshipit-source-id: 95330ca66dcb7234a3f09752ecc3ed9087ced4bf