shim which allows to compile scala program which use scala-async on dotty with dotty-cps-async

i.e. if you want port you program to dotty without changing source code, then you can replace scala-async dependecy to this shim for building with dotty.

   libraryDependencies += "com.github.rssh" %% "shim-scala-async-dotty-cps-async" % "0.9.19",

['--' in github project name changed to '-' ]

Note, that if you want bug-to-bug compatibility with scala2, than you probably want wait for official port of scala-async compiler plugin.