Add ffi extension in tests

Author: SerafimArts

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '8.4' ]
+        php: [ '8.4', '8.5' ]
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         stability: [ prefer-lowest, prefer-stable ]
     steps:
@@ -25,6 +25,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
+          extensions: ffi
           tools: pecl
           ini-values: "memory_limit=-1"
       - name: Validate Composer