Merge pull request #779 from nesquena/chore/ruby-4

Test against Ruby 4.0

Author: tagliala

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: ['2.0', '2.1', '2.2', '2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4']
+        ruby-version: ['2.0', '2.1', '2.2', '2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4', '4.0']
         channel: ['stable']
         os: ['ubuntu-latest']