Update scala to version 2.13.18

Author: zzambers

jni/scala_partest_natives.sh

@@ -4,7 +4,7 @@ rm -rf $sub
 mkdir $sub
 pushd $sub
   sbtv=1.11.4
-  scalav=2.13.16
+  scalav=2.13.18
   wget https://github.com/sbt/sbt/releases/download/v$sbtv/sbt-$sbtv.tgz
   tar -xf sbt-$sbtv.tgz
   git clone https://github.com/judovana/scala.git scala-$scalav