* Allow Functions to be called without Auth.
This was a regression from previous functionality, but is reverted
mostly to the old functionality. Previously `context` would be `nil` in
the completion handler if no Auth was available, but now `context` still
contains `instanceIDToken` but no `authToken`.
Also cover unit tests for the three states: no auth, auth error, and
valid auth.
* Style fixes.
* Cast Auth fake to prevent warning.
* Add versioning to Functions and convert to FIRLibrary
* Convert Firestore to FIRLibrary
* Point travis to FirebaseCore pre-release for its deps
* Update user agent strings to match spec
* Functions Interop
Convert Firebase Functions to use the Auth Interop pod
* Style FIxes
* Style fixes (from clang-format 7)
* Attempt to fix Travis Build
* Add Firebase/Core/Private to header search path
* Switch to using non-internal header
* Add Firebase Core private headers to search path
* Change Podfile to use Interop pods
I also removed a doubly-defined `FRAMEWORK_SEARCH_PATHS`
* Add Private Headers to search path
I also cleaned up some more project settings
* PR Feedback
* Looking for container headers
* PR Feedback
I also attempted moving the FakeApp class to the test targets and further simplified the project file.
* Re-add -all_load
* Set test target headers
I also moved the Podfile pods to the app target rather than the top-level
* Whitespace
* Re-add FirebaseFunctions to search path
* Revert project file back to origin/master
* Found the headers!
- Remove `FUNFakeApp` from app target
+ Add `FUNFakeApp` to test targets
+ Add `$(inherited)` to `HEADER_SEARCH_PATH` as per CocoaPods warning
+ Add `$(SRCROOT)/../../Firebase/Core/Private` to find `FIRComponentContainerInternal` header
~ Change import from frameworks import to regular import
* Revert xcsheme to previous version
* Update FIRFunctions.m
* CL Feedback
- Delete `FUNFakeApp`
+ Add `FIRAuthInteropFake` to test targets
~ Update initializer to use projectID instead of app
* Style fixes
* CL Feedback
* Fix Integration tests
* Set the region to the expected value
* Update node package.json to latest versions
Jason Hu