.github/workflows/test.yaml in lrama-0.6.3 vs .github/workflows/test.yaml in lrama-0.6.4

@@ -122,12 +122,11 @@
   test-ruby:
     runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
-        # '3.0' is the oldest living ruby version
-        # '2.7' is for BASERUBY
-        baseruby: ['head', '3.0', '2.7']
+        # '3.0' is the oldest living ruby version and minimal BASERUBY version
+        baseruby: ['head', '3.0']
         ruby_branch: ['master']
     defaults:
       run:
         working-directory: ../ruby/build
     steps: