Include dll in WinUI3 package

fix: unknown FirebaseProviderType

Fixes #188

Feature/v4 (#184)

Fix email validation, xamarin->maui

Full rewrite with FirebaseUI (#180)

v4

FirebaseUI for UWP, auto-upgrade anonymouse users, refactorings, more…

… tests

First public pre-release of v4 with FirebaseUI for WPF

Added linking accounts, renamed all methods to contain "Async"

Bumped nuspec version

Added email authentication methods

Merge branch 'master' of https://github.com/step-up-labs/firebase-aut…

…hentication-dotnet