Update supported OCaml versions to include 5.3.0

Author: jbdoderlein

toplevel_build/compile.sh

@@ -114,7 +114,7 @@ Usage () {
 
 # These are all the known to work versions
 # You can edit this to try older versions but we cannot guarantee it will work
-SUPPORTED_OCAML_VERSIONS=(5.1.1 5.1.0 4.14.1 4.14.0 4.13.1 4.13.0 4.12.1 4.12.0 4.11.2 4.11.1 4.11.0 4.10.2 4.10.1 4.10.0 4.09.1 4.09.0 4.08.1 4.08.0 4.07.1 4.07.0 4.06.1 4.06.0)
+SUPPORTED_OCAML_VERSIONS=(5.3.0 5.1.1 5.1.0 4.14.1 4.14.0 4.13.1 4.13.0 4.12.1 4.12.0 4.11.2 4.11.1 4.11.0 4.10.2 4.10.1 4.10.0 4.09.1 4.09.0 4.08.1 4.08.0 4.07.1 4.07.0 4.06.1 4.06.0)
 
 KEEP=false
 FORCE=false