PHP Fatal error:  Declaration of Deployer\Component\PharUpdate\Console\Command::execute(Symfony\Component\Console\Input\InputInterface $input, Symfony\Component\Console\Output\OutputInterface $output) must be compatible with Symfony\Component\Console\Command\Command::execute(Symfony\Component\Console\Input\InputInterface $input, Symfony\Component\Console\Output\OutputInterface $output): int in phar:///Users/project/deployer.phar/src/Component/PharUpdate/Console/Command.php on line 105
PHP Stack trace:
PHP   1. {main}() /Users/project/deployer.phar:0
PHP   2. require() /Users/project/deployer.phar:4
PHP   3. Deployer\Deployer::run($version = '8.0.0-alpha.3', $deployFile = '/Users/project/deploy.php') phar:///Users/project/deployer.phar/bin/dep:102
PHP   4. Deployer\Deployer->init() phar:///Users/project/deployer.phar/src/Deployer.php:288
PHP   5. Composer\Autoload\ClassLoader->loadClass($class = 'Deployer\\Component\\PharUpdate\\Console\\Command') phar:///Users/project/deployer.phar/src/Deployer.php:201
PHP   6. {closure:phar:///Users/project/deployer.phar/vendor/composer/ClassLoader.php:575-577}($file = 'phar:///Users/project/deployer.phar/vendor/composer/../../src/Component/PharUpdate/Console/Command.php') phar:///Users/project/deployer.phar/vendor/composer/ClassLoader.php:427

Fatal error: Declaration of Deployer\Component\PharUpdate\Console\Command::execute(Symfony\Component\Console\Input\InputInterface $input, Symfony\Component\Console\Output\OutputInterface $output) must be compatible with Symfony\Component\Console\Command\Command::execute(Symfony\Component\Console\Input\InputInterface $input, Symfony\Component\Console\Output\OutputInterface $output): int in phar:///Users/project/deployer.phar/src/Component/PharUpdate/Console/Command.php on line 105

Call Stack:
    0.0008    1129848   1. {main}() /Users/project/deployer.phar:0
    0.0009    1140104   2. require('phar:///Users/project/deployer.phar/bin/dep') /Users/project/deployer.phar:4
    0.0032    1659432   3. Deployer\Deployer::run($version = '8.0.0-alpha.3', $deployFile = '/Users/project/deploy.php') phar:///Users/project/deployer.phar/bin/dep:102
    0.0093    3395344   4. Deployer\Deployer->init() phar:///Users/project/deployer.phar/src/Deployer.php:288
    0.0159    4719080   5. Composer\Autoload\ClassLoader->loadClass($class = 'Deployer\\Component\\PharUpdate\\Console\\Command') phar:///Users/project/deployer.phar/src/Deployer.php:201
    0.0159    4719080   6. {closure:phar:///Users/project/deployer.phar/vendor/composer/ClassLoader.php:575-577}($file = 'phar:///Users/project/deployer.phar/vendor/composer/../../src/Component/PharUpdate/Console/Command.php') phar:///Users/project/deployer.phar/vendor/composer/ClassLoader.php:427