Fix: PHP 8 build.

Author: OskarStark

.github/workflows/ci.yml

@@ -79,6 +79,7 @@ jobs:
 
         env:
             SYMFONY_SKELETON_STABILITY: ${{ matrix.symfony-skeleton-stability }}
+            PHP_CS_FIXER_IGNORE_ENV: ${{ matrix.php-cs-fixer-ignore }}
 
         strategy:
             matrix:
@@ -87,16 +88,20 @@ jobs:
                     - '7.2.5'
                     - '7.3'
                     - '7.4'
+                php-cs-fixer-ignore:
+                    - 'false'
                 symfony-skeleton-stability:
                     - 'stable'
                 allow-failures: [false]
                 include:
                     - php-version: '7.4'
                       symfony-skeleton-stability: 'dev'
                       allow-failures: true
+                      php-cs-fixer-ignore: false
                     - php-version: '8.0'
                       symfony-skeleton-stability: 'dev'
                       allow-failures: true
+                      php-cs-fixer-ignore: true
 
         steps:
             - name: "Checkout code"
@@ -143,7 +148,7 @@ jobs:
               run: composer update
 
             - if: matrix.php-version == '8.0'
-              run: composer update --ignore-platform-reqs
+              run: composer update --ignore-platform-req=php
 
             - name: "Install PHPUnit"
               run: vendor/bin/simple-phpunit install