Utilise composer-require-checker en CI.

.gitlab-ci.yml

@@ -15,6 +15,7 @@ stages:
   script:
     - composer update $COMPOSER_OPTS
     - php -l src/*.php
+    - vendor/bin/composer-require-checker
     - vendor/bin/php-cs-fixer fix --verbose --dry-run --using-cache=no
     - vendor/bin/phpunit
   cache:

composer.json

@@ -17,6 +17,7 @@
     "symfony/cache": "^4.0"
   },
   "require-dev": {
+    "irstea/composer-require-checker-shim": "^2.0.0",
     "mikey179/vfsstream": "^1.6",
     "phpunit/phpunit": "^7.0"
   },