Sync CI script

Author: dereuromark

.github/workflows/ci.yml

@@ -59,10 +59,10 @@ jobs:
           if ${{ matrix.prefer-lowest == 'prefer-lowest' }}
           then
             composer update --prefer-lowest --prefer-stable
+            composer require --dev dereuromark/composer-prefer-lowest:dev-master
           else
             composer install --no-progress --prefer-dist --optimize-autoloader
           fi
-          if ${{ matrix.prefer-lowest == 'prefer-lowest' }}; then composer lowest-setup; fi
 
       - name: Setup problem matchers for PHPUnit
         if: matrix.db-type == 'mysql'
@@ -84,7 +84,8 @@ jobs:
           fi
 
       - name: Validate prefer-lowest
-        run: if ${{ matrix.prefer-lowest == 'prefer-lowest' }}; then vendor/bin/validate-prefer-lowest -m; fi
+        if: matrix.prefer-lowest == 'prefer-lowest'
+        run: vendor/bin/validate-prefer-lowest -m
 
       - name: Upload coverage reports to Codecov
         if: success() && matrix.php-version == '8.1'