net-mgmt/icinga-php-thirdparty: Upgrade to 0.12

This version is required by net-mgmt/icingaweb2.

Approved by:	joneum (maintainer timeout)
Release notes:	https://github.com/Icinga/icinga-php-thirdparty/tree/v0.12.0
PR:		274653
Submitted by:	Denis Shaposhnikov