Scala 3

update to scala 3.0.0-RC2

scala 3 m3

bump dotty

add ut and it in pipeline

filter only version tag

fix release yml

Merge pull request #2 from jcouyang/actions

add actions

Merge pull request #1 from jcouyang/2.13

cross compile 2.13

Merge pull request #1 from jcouyang/2.13

cross compile 2.13