Fix CI: update PHP matrix to 8.2+ for Pest v3 compatibility

Pest v3 requires PHP 8.2+. The default template had PHP 8.1 in the
matrix which caused composer install to fail. Also adds Composer
dependency caching and PHP 8.4 to the matrix.

Author: devlob

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['8.1', '8.2', '8.3']
+        php: ['8.2', '8.3', '8.4']
 
     name: PHP ${{ matrix.php }}
 
@@ -24,8 +24,16 @@ jobs:
           php-version: ${{ matrix.php }}
           coverage: none
 
+      - name: Cache Composer dependencies
+        uses: actions/cache@v4
+        with:
+          path: vendor
+          key: ${{ runner.os }}-composer-${{ hashFiles('composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
       - name: Install dependencies
-        run: composer install --no-interaction --prefer-dist
+        run: composer install --no-progress --no-interaction --prefer-dist
 
       - name: Run tests
         run: vendor/bin/pest