rake.yml in relaton-w3c-1.9.0

- old
+ new

@@ -14,22 +14,12 @@
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ matrix.experimental }}
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '2.7', '2.6', '2.5', '2.4' ]
+        ruby: [ '3.0', '2.7', '2.6', '2.5' ]
         os: [ ubuntu-latest, windows-latest, macos-latest ]
         experimental: [ false ]
-        include:
-          - ruby: '3.0'
-            os: 'ubuntu-latest'
-            experimental: true
-          - ruby: '3.0'
-            os: 'windows-latest'
-            experimental: true
-          - ruby: '3.0'
-            os: 'macos-latest'
-            experimental: true
     steps:
       - uses: actions/checkout@v2
         with:
           submodules: true
 