Trying this out as the other PR isn't running in travis (#27129)

* Update to Scala 2.13.0

* Update scalatest

.travis.yml

@@ -4,7 +4,7 @@ sudo: false
 
 scala:
   - "2.12.8"
-  - "2.13.0-RC2"
+  - "2.13.0"
 
 before_install:
   # using jabba for custom jdk management

project/AkkaDisciplinePlugin.scala

@@ -36,7 +36,7 @@ object AkkaDisciplinePlugin extends AutoPlugin with ScalafixSupport {
     Seq(coverageMinimum := 70, coverageFailOnMinimum := false, coverageOutputHTML := true, coverageHighlighting := true)
 
   lazy val silencerSettings = {
-    val silencerVersion = "1.3.3"
+    val silencerVersion = "1.4.1"
     Seq(
       libraryDependencies ++= Seq(
           compilerPlugin("com.github.ghik" %% "silencer-plugin" % silencerVersion),

project/Dependencies.scala

@@ -25,7 +25,7 @@ object Dependencies {
   val jacksonVersion = "2.9.9"
 
   val scala212Version = "2.12.8"
-  val scala213Version = "2.13.0-RC2"
+  val scala213Version = "2.13.0"
 
   val Versions = Seq(
     crossScalaVersions := Seq(scala212Version, scala213Version),
@@ -33,7 +33,7 @@ object Dependencies {
     scalaCheckVersion := sys.props.get("akka.build.scalaCheckVersion").getOrElse("1.14.0"),
     scalaTestVersion := {
       CrossVersion.partialVersion(scalaVersion.value) match {
-        case Some((2, n)) if n >= 13 => "3.0.8-RC4"
+        case Some((2, n)) if n >= 13 => "3.0.8"
         case _                       => "3.0.7"
       }
     },