build only against Composer v2

Author: mhujer

.github/workflows/main.yml

@@ -10,15 +10,9 @@ jobs:
                 operating-system: [ ubuntu-latest ]
                 php-versions: [ '8.0', '8.1' ]
                 composer-dependencies: [ '', '--prefer-lowest' ]
-                composer-version: [ 'v1' ]
                 symfony-version: [ '' ]
                 extra-label: [ '' ]
                 include:
-                    # Composer v2
-                    -   php-versions: '8.0'
-                        operating-system: ubuntu-latest
-                        composer-version: 'v2'
-                        extra-label: 'Composer v2'
 
                     # Windows
                     -   php-versions: '8.0'
@@ -43,7 +37,7 @@ jobs:
                 with:
                     php-version: ${{ matrix.php-versions }}
                     ini-values: memory_limit=-1
-                    tools: composer:${{ matrix.composer-version }}
+                    tools: composer:v2
                     coverage: ${{ matrix.coverage }}
 
             -   name: Get composer cache directory