Update sbt 2 up to 2.0.0-M3

build.sbt

@@ -25,7 +25,7 @@ libraryDependencies ++= Seq(
 (pluginCrossBuild / sbtVersion) := {
   scalaBinaryVersion.value match {
     case "2.12" => "1.5.8"
-    case _ => "2.0.0-M2"
+    case _ => "2.0.0-M3"
   }
 }