ci: bump ramsey/composer-install action to v3 (#128)

Author: marmichalski

.github/workflows/ci.yaml

@@ -57,7 +57,7 @@ jobs:
         run: "composer config platform.php ${{ matrix.php-version }}"
 
       - name: "Install dependencies"
-        uses: ramsey/composer-install@v2
+        uses: ramsey/composer-install@v3
         with:
           dependency-versions: "${{ matrix.dependencies }}"