chore: add Ruby 4.0 to CI matrix, run lint checks on 3.4 and 4.0

Author: nijeesh-stream

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 1
       matrix:
-        ruby: ["3.0", "3.1", "3.4"]
+        ruby: ["3.0", "3.1", "3.4", "4.0"]
     name: 💎 Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v4
@@ -21,10 +21,10 @@ jobs:
           bundler-cache: true
 
       - run: bundle exec rake rubocop
-        if: ${{ matrix.ruby == '3.4' }}
+        if: ${{ matrix.ruby == '3.4' || matrix.ruby == '4.0' }}
 
       - run: bundle exec srb tc
-        if: ${{ matrix.ruby == '3.4' }}
+        if: ${{ matrix.ruby == '3.4' || matrix.ruby == '4.0' }}
 
       - run: bundle exec rspec ./spec --require spec_helper
         env: