6.1.0-rc.4

Bug Fixes

• auth: ScreenTrackingService will now wait for UserTrackingService to report an initial result, if UserTrackingService has been provided (#2661) (b666a80)

Features

• core: Adding global caches that survive/warn on HMR (#2661) (b666a80), closes #2655
• auth: Warn when using Auth emulator in conjunction with database or firestore, (#2661) (b666a80), closes #2656
• auth: Adding AngularFireAuth.credential an observer for firebase.auth.UserCredential (#2661) (b666a80)
• auth: ScreenTrackingService now logs sign_up and login events (#2661) (b666a80)