firebase-ios-sdk

Firebase Installations: validation of FIROptions parameters (#4683)

* FIS: Throw exception on incomplete Firebase config.

* API docs updated.

* FirebaseInstallations bump minor version: 1.1.0

* Fix tests

* Text fixed

* Make exception message more informative

* Fix Remote Config tests.

* Tests updated to use GCMSenderID if projectID is not available.

* Use `GCMSenderID` when `projectID` is not available.

* ./scripts/style.sh

* Comments

* GCMSenderID and projectID validation updated.

* Comment

* FirebaseInstallations: version bump to 1.0.1.

* FIS changelog

* FirebaseInstallations: version bump to 1.1.0

* FIS and Core changelogs.

* Changelogs remove GCMSenderID

* Typo

* Typo

* fix link

* Revert Core changelog

* FIS changelog fix.