ruby.yml in stackprof-webnav-1.0.3

- old
+ new

@@ -17,10 +17,12 @@
   test:
 
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.7']
+        ruby-version:
+          - '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,