ruby.yml in coveralls_reborn-0.24.0

- old
+ new

@@ -10,10 +10,10 @@
   test:
     name: Tests
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.5', '2.6', '2.7', '3.0']
+        ruby-version: ['2.5', '2.6', '2.7', '3.0', '3.1']
         experimental: [false]
 
         include:
           - ruby-version: 'head'
             experimental: true