PHP 8.1

Dropped support for PHP 7
Extended use of strict type hinting

PHP 8 Upgrade

• dropped support for older unmaintained php versions
• updated dependencies
• cleaned up old config files
• introduced strict types where possible

Symfony v3 & v4 support

Removed the upper bound on the symfony/console dependency, to support Symfony v3 and v4 based projects

PHPUnit 7 compatibility

• Raise supported symfony/console version to 2.7 to support projects running PHPUnit 6 and 7

PHP 7.2 compatibility

Adjusting signal handler signatures and fixed closure definitions.

Proper UNIX signal handling

Updated process signal handler functions to properly handle UNIX signals.

Delete outdated job status

2.5.0

adjust commen - code review suggetion