Merge pull request rsim#2291 from bjfish/truffleruby-ci-2

Test TruffleRuby in CI

Author: yahonda

.github/workflows/test.yml

@@ -21,7 +21,8 @@ jobs:
         ruby: [
           '3.1',
           '3.0',
-          '2.7'
+          '2.7',
+          'truffleruby-head'
         ]
     env:
       ORACLE_HOME: /usr/lib/oracle/21/client64