Firebase 10 support

[blairjo]

Version info

Firebase:
10.11.0

GeoFire:
6.0.0

Node

Test case

Geofire 6.0.0 (latest) only allows up to firebase 9. Firebase 10 has been out for a while - can this project be updated please as I can't run npm install or deploy any firebase functions

Steps to reproduce

run npm installl or deploy firebase functions using firebase 10

Expected behavior

should inaall /deploy

Actual behavior

errors due to imcompatibility between geofire 6.0.0 and firebase 10

[wyun]

yes, please support the latest firebase