Update minimum supported versions across platforms

[paulb777]

Xcode 14 updates to the following minimums: iOS 11, macOS 10.13, tvOS 11.

Update Firebase to the same minimums in the next major release.

[thedogrex]

LOL

[ncooke3]

@paulb777, starting work on this. I updated the title and description to remove iOS 11 requirement.

[ncooke3]

Fixed in #10233