A workaround to build Java 8 bytecode using Java 11

build.sbt

@@ -16,6 +16,7 @@ ThisBuild / tlSonatypeUseLegacyHost := true
 
 ThisBuild / crossScalaVersions := Seq(scala212, scala213, scala3)
 ThisBuild / scalaVersion := scala213 // the default Scala
+ThisBuild / githubWorkflowJavaVersions += JavaSpec.temurin("11")
 
 lazy val root = tlCrossRootProject.aggregate(core, circe, jsoniterScala, polyline).settings(name := "geo-scala")
 
@@ -25,6 +26,9 @@ lazy val commonSettings = Seq(
     "org.scalatestplus" %%% "scalacheck-1-16" % "3.2.13.0" % Test,
     "org.scalacheck" %%% "scalacheck" % "1.16.0" % Test
   ),
+  scalacOptions ++= Seq(
+    "-release 8"
+  ),
   // disable MiMa until we have proper version released on gnieh / all platforms
   // once removed, the tlBaseVersion has to adjusted as well
   mimaPreviousArtifacts := Set.empty