Scala 3 compatible

[gaeljw]

Hello,

I was just trying out the plugin on different projects and it seems to encounter an issue with Scala 3 projects.

When looking for the previous version to run the checks (sbt versionPolicyCheck running), it fails to retrieve it:

[error] sbt.librarymanagement.ResolveException: Error downloading io.github.gaeljw:typetrees_3.0.0-RC1_3.0:0.2.0
[error]   Not found
[error]   not found: https://repo1.maven.org/maven2/io/github/gaeljw/typetrees_3.0.0-RC1_3.0/0.2.0/typetrees_3.0.0-RC1_3.0-0.2.0.pom

It's looking for a weird artifact name io.github.gaeljw:typetrees_3.0.0-RC1_3.0:0.2.0 instead of io.github.gaeljw:typetrees_3.0.0-RC1:0.2.0.

I guess it may be more related to the "RC1" than Scala 3.

[SethTisue]

I'm hitting this as well at scala/scala-parallel-collections#164

[SethTisue]

perhaps this is a problem with sbt-mima rather than an issue in this repo per se? lightbend-labs/mima#613