cleaner github actions

Author: ahorek

.github/workflows/test.yml

@@ -15,24 +15,20 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-20.04
-        - ubuntu-18.04
-        - macos-11
-        - macos-10.15
+        - ubuntu-latest
+        - macos-latest
         - windows-latest
         ruby:
         - '3.0'
         - 2.7
         - 2.6
-        - debug
+        - 2.5
         include:
-        - { os: ubuntu-20.04,   ruby: head, ignore-pkg-error: true }
+        - { os: ubuntu-latest,   ruby: head, ignore-pkg-error: true }
         - { os: windows-latest, ruby: mingw, ignore-pkg-error: true }
         - { os: windows-latest, ruby: mswin, ignore-pkg-error: true }
-        - { os: ubuntu-20.04,   ruby: jruby }
-        - { os: ubuntu-20.04,   ruby: jruby-head, ignore-pkg-error: true }
-        exclude:
-        - { os: windows-latest, ruby: debug }
+        - { os: ubuntu-latest,   ruby: jruby }
+        - { os: ubuntu-latest,   ruby: jruby-head, ignore-pkg-error: true }
 
     steps:
       - uses: actions/checkout@v2
@@ -51,4 +47,4 @@ jobs:
 
       - name: Integration test
         run: bundle exec rake check
-        continue-on-error: ${{ matrix.ignore-pkg-error || (matrix.ruby == 'debug') }}
+        continue-on-error: ${{ matrix.ignore-pkg-error }}