Ajout composer pour ne pas "casser" les nouvelles installs

app/Vendor/composer/ClassLoader.php

app/Vendor/composer/InstalledVersions.php

app/Vendor/composer/LICENSE

app/Vendor/composer/autoload_classmap.php

app/Vendor/composer/autoload_files.php

app/Vendor/composer/autoload_namespaces.php

app/Vendor/composer/autoload_psr4.php

app/Vendor/composer/autoload_real.php

app/Vendor/composer/autoload_static.php

app/Vendor/composer/installed.json

app/Vendor/composer/installed.php

app/Vendor/composer/platform_check.php

app/Vendor/composer/xdebug-handler/CHANGELOG.md

app/Vendor/composer/xdebug-handler/LICENSE

app/Vendor/composer/xdebug-handler/README.md

app/Vendor/composer/xdebug-handler/composer.json

app/Vendor/composer/xdebug-handler/src/PhpConfig.php

app/Vendor/composer/xdebug-handler/src/Process.php

app/Vendor/composer/xdebug-handler/src/Status.php

app/Vendor/composer/xdebug-handler/src/XdebugHandler.php