CHANGELOG: Clearly specify when we drop API v2.
CHANGELOG: Clearly specify when we drop API v2.

dforste/pypuppetdb,voxpupuli/pypuppetdb,puppet-community/pypuppetdb,vicinus/pypuppetdb,jcastillocano/pypuppetdb,jcastillocano/pypuppetdb,jorik041/pypuppetdb,amwilson/pypuppetdb