* Add deployment_targets for macOS and tvOS in FirebaseFirestoreSwift
* Add FirebaseFirestoreSwift as a dependency to all integration tests
* Add swift integration tests to sync_project.rb
* Add Firestore_SwiftTests_iOS target to Xcode
* Add FirebaseFirestoreSwift podspec
* Add Firestore_SwiftTests_iOS to the Podfile
* Add CodableGeoPoint and tests
* Version FirebaseFirestoreSwift separately