scala: Upgrade versions

Author: felixbr

.github/workflows/continuous-integration.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        scala: [2.12.12, 2.13.6]
+        scala: [2.12.15, 2.13.6]
         java: ['1.8', '1.11']
     runs-on: ubuntu-latest
     steps:

build.sbt

@@ -82,16 +82,18 @@ def jdk11GcJavaOptions: Seq[String] = {
   )
 }
 
+// Upgrading to a later version requires also upgrading sbt-scoverage, Scalatest, and
+// some modules like util-mock and util-test.
 val _scalaVersion = "2.13.6"
-val _crossScalaVersions = Seq("2.12.12", "2.13.6")
+val _crossScalaVersions = Seq("2.12.15", "2.13.6")
 
 val defaultScalaSettings = Seq(
   scalaVersion := _scalaVersion,
   crossScalaVersions := _crossScalaVersions
 )
 val defaultScala3EnabledSettings = Seq(
   scalaVersion := _scalaVersion,
-  crossScalaVersions := _crossScalaVersions ++ Seq("3.0.2-RC1")
+  crossScalaVersions := _crossScalaVersions ++ Seq("3.1.3")
 )
 
 // Our dependencies or compiler options may differ for both Scala 2 and 3. We branch here

project/plugins.sbt

@@ -2,6 +2,6 @@ resolvers += Classpaths.sbtPluginReleases
 resolvers += Resolver.sonatypeRepo("snapshots")
 
 addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.1")
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.9.1")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.9.3")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.3")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.31")