fix: support LTS versions of ruby

.github/workflows/default.yml

@@ -8,6 +8,12 @@ concurrency:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        ruby_version:
+          - '3.0'
+          - '3.1'
+          - '3.2'
     name: Build
     runs-on: ubuntu-22.04
     steps:
@@ -18,6 +24,7 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           bundler-cache: true
+          ruby-version: ${{ matrix.ruby_version }}
       - name: Fetch main branch
         run: git fetch origin main
       - uses: r7kamura/rubocop-problem-matchers-action@v1
@@ -28,17 +35,6 @@ jobs:
           bundle exec bundle-audit check
       - name: Run rspec
         run: bundle exec rspec
-      - name: Check if version has changed
-        if: ${{ github.ref == 'refs/heads/main' }}
-        id: version-check
-        run: |
-          if [ "$(git diff --name-only HEAD^ HEAD | grep 'lib/eventsimple/version.rb')" ]; then
-            echo "Version did change"
-            echo "version_changed=true" >> $GITHUB_OUTPUT
-          else
-            echo "Version did not change"
-            echo "version_changed=false" >> $GITHUB_OUTPUT
-          fi
       - name: Release the gem
         if: ${{ github.ref == 'refs/heads/main' && steps.version-check.outputs.version_changed == 'true' }}
         run: |