Update scalacache, enable build on Scala 3

[kubukoz]

This may take a while to get green as Scalacache 1.0.0-M4 is only being published to Maven Central right now. I'll update to 1.0.0-M3 first in another PR.

[kubukoz]

@Mergifyio rebase

[mergify]

Command rebase: failure

Base branch update has failed
Git reported the following error:

Rebasing (1/1)

error: could not apply e312a56... Update scalacache, enable build on Scala 3

Resolve all conflicts manually, mark them as resolved with
"git add/rm <conflicted_files>", then run "git rebase --continue".
You can instead skip this commit: run "git rebase --skip".
To abort and get back to the state before "git rebase", run "git rebase --abort".
Could not apply e312a56... Update scalacache, enable build on Scala 3
Auto-merging build.sbt
CONFLICT (content): Merge conflict in build.sbt

err-code: A806E

[kubukoz]

fine I'll do it myself