Update Scala to 2.13.12

[lefou]

• Fix: Please publish for Scala 2.13.12 #1373

Pull request: #1374

[lefou]

Looks like Ammonite has issues with changes in the scala-compiler 2.13.12.

$ ./mill -i unitTest "2.13.12"
Compiling /home/runner/work/Ammonite/Ammonite/build.sc
GITHUB REF Some(refs/pull/1374/merge)
...
[366/647] amm.compiler[2.13.12].compile 
[info] compiling 22 Scala sources to /home/runner/work/Ammonite/Ammonite/out/amm/compiler/2.13.12/compile.dest/classes ...
[warn] /home/runner/work/Ammonite/Ammonite/amm/compiler/src/main/scala-2/ammonite/compiler/internal/CustomURLZipArchive.scala:74:18: reference to output is ambiguous;
[warn] it is both defined in the enclosing class CustomURLZipArchive and inherited in the enclosing class File as method output (defined in class VirtualFile, inherited through parent class Entry)
[warn] In Scala 2, symbols inherited from a superclass shadow symbols defined in an outer scope.
[warn] Such references are ambiguous in Scala 3. To continue using the inherited symbol, write `this.output`.
[warn] Or use `-Wconf:msg=legacy-binding:s` to silence this warning. [quickfixable]
[warn]         val os = output
[warn]                  ^
Error:  /home/runner/work/Ammonite/Ammonite/amm/compiler/src/main/scala-2.13.1+/ammonite/compiler/MakeReporter.scala:25:11: `override` modifier required to override concrete member:
Error:  def doReport(pos: scala.reflect.internal.util.Position, msg: String, severity: this.Severity): Unit (defined in class FilteringReporter)
Error:        def doReport(pos: scala.reflect.internal.util.Position,
Error:            ^
[warn] /home/runner/work/Ammonite/Ammonite/amm/compiler/src/main/scala-2/ammonite/compiler/Parsers.scala:57:53: comparing values of types fastparse.ScalaWhitespace.whitespace.type and fastparse.NoWhitespace.noWhitespaceImplicit.type using `ne` will always yield true
[warn]   private def Prelude[_: P] = P( (Annot ~ OneNLMax).rep ~ (Mod ~/ Pass).rep )
[warn]                                                     ^
[warn] /home/runner/work/Ammonite/Ammonite/amm/compiler/src/main/scala-2/ammonite/compiler/Parsers.scala:57:73: comparing values of types fastparse.ScalaWhitespace.whitespace.type and fastparse.NoWhitespace.noWhitespaceImplicit.type using `ne` will always yield true
[warn]   private def Prelude[_: P] = P( (Annot ~ OneNLMax).rep ~ (Mod ~/ Pass).rep )
[warn]                                                                         ^
[warn] /home/runner/work/Ammonite/Ammonite/amm/compiler/src/main/scala-2/ammonite/compiler/Parsers.scala:134:67: comparing values of types fastparse.ScalaWhitespace.whitespace.type and fastparse.NoWhitespace.noWhitespaceImplicit.type using `ne` will always yield true
[warn]   private def Separator[_: P] = P( WL ~ "@" ~~ CharIn(" \n\r").rep(1) )
[warn]                                                                   ^
[warn] four warnings found
Error:  one error found
1 targets failed

[scoquelin]

Ammonite/amm/compiler/src/main/scala-2.13.1+/ammonite/compiler/MakeReporter.scala

Line 25 in fe58127

def doReport(pos: scala.reflect.internal.util.Position,

@lefou
Unless I am missing something, just replacing def doReport by override def doReport as suggested by the compiler should do the trick?

[alexarchambault]

Just did that in #1375 (sorry I missed that PR)