Switch to composer 2.1

Author: GrahamCampbell

.github/workflows/static.yml

@@ -17,7 +17,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: 7.4
-          tools: composer:v2
+          tools: composer:2.1
           coverage: none
 
       - name: Install Dependencies
@@ -49,7 +49,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: 7.4
-          tools: composer:v2
+          tools: composer:2.1
           coverage: none
 
       - name: Install Dependencies
@@ -81,7 +81,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: 7.4
-          tools: composer:v2, cs2pr
+          tools: composer:2.1, cs2pr
           coverage: none
 
       - name: Install Dependencies

.github/workflows/tests.yml

@@ -21,7 +21,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
-          tools: composer:v2
+          tools: composer:2.1
           coverage: none
 
       - name: Setup Problem Matchers