raise dependency on PHP 7.4
raise dependency on laminas-mvc 3.13.3
raise dependency on laminas-session 2.12.1
raise dependency on laminas-stdlib 3.10.1

keep compatibility using laminas-zendframework-bridge
  as this is only used using compat autolader

raise dependency on PHP 7.3
raise dependency on laminas-stdlib 3.3
switch to phpunit9