GH Actions: version update for ramsey/composer-install

The action used to install Composer packages and handle the caching has released a new major (and some follow-up patch releases), which means, the action reference needs to be updated to benefit from it.

Refs:
* https://github.com/ramsey/composer-install/releases/tag/2.0.0
* https://github.com/ramsey/composer-install/releases/tag/2.0.1
* https://github.com/ramsey/composer-install/releases/tag/2.0.2

Author: jrfnl

.github/workflows/phpstan.yml

@@ -33,7 +33,7 @@ jobs:
       # Dependencies need to be installed to make sure the PHPUnit classes are recognized.
       # @link https://github.com/marketplace/actions/install-composer-dependencies
       - name: Install Composer dependencies
-        uses: "ramsey/composer-install@v1"
+        uses: "ramsey/composer-install@v2"
 
       - name: Run PHPStan
         run: phpstan analyse --configuration=phpstan.neon

.github/workflows/test.yml

@@ -116,12 +116,12 @@ jobs:
       # @link https://github.com/marketplace/actions/install-composer-dependencies
       - name: Install Composer dependencies - normal
         if: ${{ matrix.php < '8.0' }}
-        uses: "ramsey/composer-install@v1"
+        uses: "ramsey/composer-install@v2"
 
       # For PHP 8.0+, we need to install with ignore platform reqs as PHPUnit 7 is still used.
       - name: Install Composer dependencies - with ignore platform
         if: ${{ matrix.php >= '8.0' }}
-        uses: "ramsey/composer-install@v1"
+        uses: "ramsey/composer-install@v2"
         with:
           composer-options: --ignore-platform-reqs