raise dependency on PHP 8.0
drop dependency on laminas-json

keep compatibility using laminas-zendframework-bridge
  as this is only used using compat autolader
raise dependency on laminas-http 2.15
raise dependency on laminas-json 3.3
raise dependency on laminas-stdlib 3.6

raise dependency on PHP 7.3
raise dependency on laminas-http 2.14
raise dependency on laminas-json 3.2
raise dependency on laminas-stdlib 3.3
raise dependency on laminas-zendframework-bridge 1.1