Scala 2.13 support

[danbim]

It would be great to have a cross-build for Scala 2.13. emailaddress is one of the last libs in my dependency tree not available for Scala 2.13

[samihus]

I dont know if this is useful now: I updated a fork of this library here: (https://github.com/samihus/emailaddress)
This update enables support of recent versions of the used libs in addition to scala 2.13, but removes the compatibility with scala 2.11 and 2.12