.github/workflows/ubuntu.yml in textbringer-1.0.3 vs .github/workflows/ubuntu.yml in textbringer-1.0.4

@@ -1,18 +1,17 @@
 name: ubuntu
 
 on: [push]
 
 jobs:
-  build:
-    runs-on: ubuntu-latest
+  test:
     strategy:
       matrix:
-        ruby: [ '2.6.x', '2.5.x', '2.4.x' ]
+        ruby: [ head, 2.7, 2.6, 2.5, 2.4 ]
+    runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
-    - name: Set up Ruby
-      uses: actions/setup-ruby@v1
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
     - name: Install dependencies
       run: |
         sudo apt install libncursesw5-dev