Build Cache for React Native v0.12.0

Changelog
1

What’s Changed

  • Update CLI to v3.4.0
  • Picks up the Xcode/SPM fixes in CLI v3.4.0, which the iOS half of a React Native build benefits from: cache steps can now reach the SPM checkouts under the relocated DerivedData, and -list / -resolvePackageDependencies no longer re-fetch every package into the default DerivedData