raise dependency on PHP 8.0

raise dependency on laminas-stdlib 3.6
switch to phpunit9

drop zendframework compatibility layer

raise dependency on PHP 7.3
switch to phpunit8

install in /usr/share/php/Laminas/Config3
update to 3.3.0
raise dependency on PHP 5.6
raise dependency on laminas-stdlib 3.1
add dependency on psr/container
add dependency on json extention
drop dependency on laminas-json