Update ruby versions to test

.github/workflows/ci.yml

@@ -13,24 +13,25 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1
+          ruby-version: ruby
           bundler-cache: true
       - name: Linting
         run: bundle exec standardrb
+        env:
+          RUBYOPT: --disable=syntax_suggest
+
+  ruby-versions:
+    uses: ruby/actions/.github/workflows/ruby_versions.yml@master
+    with:
+      engine: cruby
 
   test:
+    needs: ruby-versions
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        ruby:
-          - 2.5
-          - 2.6
-          - 2.7
-          - '3.0'
-          - 3.1
-          - 3.2
-          - head
+        ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
     steps:
       - name: Checkout code
         uses: actions/checkout@v3.5.3

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## HEAD (unreleased)
 
+- No longer supports EOL versions of Ruby.
+
 ## 1.1.0
 
 - Handle if/else with comment or empty line in branch (https://github.com/ruby/syntax_suggest/pull/193)