add 2.13.16 to crossbuild (#376)

Author: raboof

.github/workflows/validate.yml

@@ -22,6 +22,7 @@ jobs:
           - 2.13.13
           - 2.13.14
           - 2.13.15
+          - 2.13.16
         java: [8, 11, 17, 21]
 
     steps:

build.sbt

@@ -47,7 +47,7 @@ lazy val defaults = Seq(
   scalaVersion := crossScalaVersions.value.last,
   crossScalaVersions := {
     val supportedScala212Versions = (18 to 20).map(p => s"2.12.$p")
-    val supportedScala213Versions = (11 to 15).map(p => s"2.13.$p")
+    val supportedScala213Versions = (11 to 16).map(p => s"2.13.$p")
     supportedScala212Versions ++ supportedScala213Versions
   },
   scalaMajorVersion := CrossVersion.partialVersion(scalaVersion.value).get._2.toInt,