Merge pull request firebase#524 from firebase/dpebot-repositorygardener Auto-update dependencies.

Merge pull request firebase#523 from morganchen12/master Improve error reporting in FUIArray

bump version to 5.2.0 Change-Id: I4e24ab48dd919bbe9094b4be4c7fbfc29db9cb34

add swift sample Podfile Change-Id: I25da2a42600239d0c06292c819ddd8461dc67f06

Merge pull request firebase#486 from firebase/Yue-Wang-Google-patch-1 Fix a bug where translation string is not correctly populated

Update pod version for 5.1.2 Change-Id: I509fc0a1993faf3f24a929ea74f23f0fd240e771

Quick fixes to auto anonymous upgrade (firebase#483) 

Merge pull request firebase#457 from najdanovicivan/email-entry-title Email entry title

Remove cpdc references Change-Id: I6149f3df145eaa7a588a10f13adc3dec834cd867

Merge pull request firebase#421 from morganchen12/firestore-fix fix firebase#420