ci: modify PHP build configuration

Author: ace411

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['8.1', '8.2', '8.3']
+        php: ['8.1', '8.2', '8.3', '8.4']
     name: PHP ${{ matrix.php }}
     steps:
       - uses: actions/checkout@v4
@@ -18,6 +18,8 @@ jobs:
         with:
           php-version: ${{ matrix.php }}
           extensions: posix, pcntl
+        env:
+          phpts: ts
       - name: Run tests
         run: |
           git clone https://github.com/markreedz/mrloop.git mrloop && \