fixup! Remove support for ruby 2.4, 2.5 and beak up large models spec file

Author: ctran

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.6']
+        ruby: ['2.4', '2.5', 2.6']
 
     steps:
       - name: Checkout