Update scala 2.13.0-RC2 to 2.13.0-RC3

Author: Philippus

build.sbt

@@ -10,11 +10,11 @@ scalacOptions in ThisBuild ++= Seq("-deprecation", "-feature")
 
 // Map[JvmMajorVersion, List[(ScalaVersion, UseForPublishing)]]
 scalaVersionsByJvm in ThisBuild := Map(
-   8 -> List("2.11.12", "2.12.8", "2.13.0-RC2").map(_ -> true),
-   9 -> List("2.11.12", "2.12.8", "2.13.0-RC2").map(_ -> false),
-  10 -> List("2.11.12", "2.12.8", "2.13.0-RC2").map(_ -> false),
-  11 -> List("2.11.12", "2.12.8", "2.13.0-RC2").map(_ -> false),
-  12 -> List("2.11.12", "2.12.8", "2.13.0-RC2").map(_ -> false)
+   8 -> List("2.11.12", "2.12.8", "2.13.0-RC3").map(_ -> true),
+   9 -> List("2.11.12", "2.12.8", "2.13.0-RC3").map(_ -> false),
+  10 -> List("2.11.12", "2.12.8", "2.13.0-RC3").map(_ -> false),
+  11 -> List("2.11.12", "2.12.8", "2.13.0-RC3").map(_ -> false),
+  12 -> List("2.11.12", "2.12.8", "2.13.0-RC3").map(_ -> false)
 )
 
 scalaVersion in ThisBuild := "2.12.8"