Use STARR from scala#6730

Author: smarter

build.sbt

@@ -333,7 +333,11 @@ def regexFileFilter(s: String): FileFilter = new FileFilter {
 }
 
 // This project provides the STARR scalaInstance for bootstrapping
-lazy val bootstrap = project in file("target/bootstrap")
+lazy val bootstrap = project.in(file("target/bootstrap"))
+  .settings(
+    resolvers += "pr" at "https://scala-ci.typesafe.com/artifactory/scala-pr-validation-snapshots/"
+  )
+
 
 lazy val library = configureAsSubproject(project)
   .settings(generatePropertiesFileSettings)

versions.properties

@@ -1,5 +1,5 @@
 # Scala version used for bootstrapping (see README.md)
-starr.version=2.13.0-M4
+starr.version=2.13.0-pre-c7dc80c-SNAPSHOT
 
 # These are the versions of the modules that go with this release.
 # Artifact dependencies: