Updated CI config.

Author: stas

.github/workflows/ci.yml

@@ -8,15 +8,14 @@ jobs:
 
     strategy:
       matrix:
-        ruby: [2.4, 2.6]
+        ruby: [2.4, 2.7]
 
     steps:
     - uses: actions/checkout@master
 
-    - name: Sets up the environment
-      uses: actions/setup-ruby@v1
+    - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
 
     - name: Runs code QA and tests
-      run: gem install bundler && bundle && rake
+      run: bundle && rake