AuthenticatorSelector constructor Null safety

1. nevis_mobile_authentication_sdk
2. nevis_mobile_authentication_sdk
3. AuthenticatorSelector
4. AuthenticatorSelector constructor

AuthenticatorSelector class

1. Constructors
2. AuthenticatorSelector
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. selectAuthenticator
9. toString
10. Operators
11. operator ==