1.11.0-beta.6

Bugfix

• The plugin now declares that it is for Grav 1.7 only, so Grav 2 sites are no longer offered it. Grav 2 ships Admin 2; without that declaration this beta was still served on the testing release channel, where it could be installed alongside Admin 2 by any plugin that still listed admin as a dependency getgrav/grav-premium-issues#618