Real versions

Author: pcothenet

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: [3.0.x, 2.7.x, 2.6.x]
+        ruby-version: [3.0.1, 2.7.4, 2.6.8]
 
     steps:
       - name: Check out code