Publish to maven central instead of bintray

[Isammoc]

Thank you for this plugin! We love it! And we don't want to lose it when JFrog will sunset bintray/jcenter.

Can you publish to maven central (or any other public repository that won't be sunset soon)? :pray:

References: sbt/sbt#6294 https://jfrog.com/blog/into-the-sunset-bintray-jcenter-gocenter-and-chartcenter/

As this repo is part of "sbt" GitHub organization: cc @eed3si9n

[hseeberger]

Thanks @Isammoc for bringing this up.

@eed3si9n do we have a new place for sbt plugins?

[eed3si9n]

We're planning on migrating existing versions on Bintray to somewhere read-only.

New versions should be published to Maven Central.

[Philippus]

5.6.5 is released on maven now.

[mkurz]

Can be closed I guess.