raise dependency on PHP 8.0
raise dependency on laminas-servicemanager 3.19
raise dependency on zend-stdlib >= 3.7.1

raise dependency on zend-stdlib >= 3.6
keep compatibility using laminas-zendframework-bridge
  as this is only used using compat autolader

raise dependency on PHP 7.3
raise dependency on laminas-servicemanager 3.4
raise dependency on zend-stdlib >= 3.1
switch to phpunit9