.github/workflows/macos.yml in fluent-plugin-elasticsearch-4.1.4 vs .github/workflows/macos.yml in fluent-plugin-elasticsearch-4.2.0

@@ -6,10 +6,10 @@
   build:
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '2.4', '2.5', '2.6' ]
+        ruby: [ '2.4', '2.5', '2.6', '2.7' ]
         os:
           - macOS-latest
     name: Ruby ${{ matrix.ruby }} unit testing on ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2