Fixed build failure of the latest GitHub Actions

Author: hsbt

.github/workflows/macos.yml

@@ -7,13 +7,13 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        ruby: [ '2.6.x', '2.5.x', '2.4.x', '2.3.x' ]
+        ruby: [ '2.6.x', '2.5.x', '2.4.x' ]
     steps:
     - uses: actions/checkout@master
     - name: Set up Ruby
       uses: actions/setup-ruby@v1
       with:
-        version: ${{ matrix.ruby }}
+        ruby-version: ${{ matrix.ruby }}
     - name: Install dependencies
       run: gem install minitest
     - name: Run test

.github/workflows/ubuntu-rvm.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ 'jruby-head', 'jruby-9.2.8.0', 'ruby-head', '2.2.10' ]
+        ruby: [ 'jruby-head', 'jruby-9.2.9.0', 'ruby-head', '2.3.8', '2.2.10' ]
     steps:
     - uses: actions/checkout@master
     - name: Set up RVM

.github/workflows/ubuntu.yml

@@ -7,13 +7,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '2.6.x', '2.5.x', '2.4.x', '2.3.x' ]
+        ruby: [ '2.6.x', '2.5.x', '2.4.x' ]
     steps:
     - uses: actions/checkout@master
     - name: Set up Ruby
       uses: actions/setup-ruby@v1
       with:
-        version: ${{ matrix.ruby }}
+        ruby-version: ${{ matrix.ruby }}
     - name: Install dependencies
       run: gem install minitest
     - name: Run test

.github/workflows/windows.yml

@@ -13,7 +13,7 @@ jobs:
     - name: Set up Ruby
       uses: actions/setup-ruby@v1
       with:
-        version: ${{ matrix.ruby }}
+        ruby-version: ${{ matrix.ruby }}
     - name: Install dependencies
       run: gem install minitest
     - name: Run test