ci.yml in nacelle-0.4.2

- old
+ new
@@ -3,26 +3,11 @@
 jobs:
   test:
     strategy:
       fail-fast: false
       matrix:
-        gemfile: [ rails_5.1, rails_5.2, rails_6.0, rails_6.1, rails_7.0 ]
-        ruby: [ 2.4, 2.5, 2.6, 2.7, '3.0' ]
-        exclude:
-          - gemfile: rails_5.1
-            ruby: 3.0
-          - gemfile: rails_5.2
-            ruby: 3.0
-          - gemfile: rails_6.0
-            ruby: 2.4
-          - gemfile: rails_6.1
-            ruby: 2.4
-          - gemfile: rails_7.0
-            ruby: 2.4
-          - gemfile: rails_7.0
-            ruby: 2.5
-          - gemfile: rails_7.0
-            ruby: 2.6
+        gemfile: [ rails_6.0, rails_6.1, rails_7.0 ]
+        ruby: [ 2.7, '3.0', 3.1 ]
 
     runs-on: ubuntu-latest
     env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     steps: