Merge pull request #158 from scala-steward/update/sbt-scalajs-1.10.1

Update sbt-scalajs, scalajs-compiler, ... to 1.10.1

remove unused method

warn (don't abort) for leftovers

bump versions"

update scala-js

Merge pull request #106 from scala-steward/update/sbt-scalafix-0.9.30

Update sbt-scalafix to 0.9.30

Merge pull request #101 from scala-steward/update/sbt-updates-0.6.0

Update sbt-updates to 0.6.0

Add issue links / attribution

add sbt-ci-workflow