Merge pull request scala#495 from lrytz/toConserve

preserve immutable collections in to(Target) conversions

Merge pull request scala#468 from Philippus/patch-1

Use jsEnablePlugins-method

add Scala 3.0.0 to crossbuild (drop -RC2) (scala#451)

backpublish 2.4.3 for Scala 3.0.0-RC3

Merge pull request scala#440 from SethTisue/scala-3.0.0-RC2

Merge pull request scala#429 from SethTisue/scala-3.0.0-RC1

add Scala 3.0.0-RC1 (drop M2)

bump our own version

Merge pull request scala#417 from SethTisue/make-nowarn-support-2.12.13

Update sbt-dotty to 0.5.1 (scala#401)

Merge pull request scala#393 from griggt/update/3.0.0-M2

Update for Scala 3.0.0-M2