Add Ruby 3.1 to CI workflow

piotrmurach · piotrmurach · commit ea5e2a41a528 · 2022-02-08T23:50:03.000+01:00
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -28,6 +28,7 @@ jobs:
           - 2.5
           - 2.6
           - 3.0
+          - 3.1
           - ruby-head
           - jruby-9.2.13.0
           - jruby-head
