ruby.yml in ezid-client-1.9.2

- old
+ new

@@ -17,10 +17,10 @@
   test:
 
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7']
+        ruby-version: ['2.6', '2.7', '3.0']
 
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
     # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,