migrate to github actions

Author: olegantonyan

.github/workflows/tests.yml

@@ -26,6 +26,9 @@ jobs:
       matrix:
         ruby-version: ['3.2', '3.3', '3.4']
         gemfile: ['7.0', '7.1', '7.2', '8.0']
+        exclude:
+        - ruby-version: '3.4'
+          gemfile: '7.0'
 
     steps:
       - uses: actions/checkout@v4