ci.yml in discourse_theme-0.9.0

- old
+ new

@@ -11,11 +11,10 @@
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
         ruby:
-          - "2.7"
           - "3.0"
           - "3.1"
           - "3.2"
 
     steps:
@@ -27,9 +26,14 @@
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
 
       - name: Lint
         run: bundle exec rubocop
+
+      - name: syntax_tree
+        run: |
+          bundle exec stree check Gemfile $(git ls-files '*.rb') $(git ls-files '*.rake') $(git ls-files '*.thor')
+
 
       - name: Tests
         run: bundle exec rake test
 
   publish: