graphics/py-django-easy-thumbnails: Update to 2.10.1

• Switch to the PEP517 build framework and adjust the relevant bits of the DOCS option accordingly.

• Update WWW to point to actual upstream repository.

• Introduce SVG option and make it default as the dependencies were used unconditionally before.

• Also switch to the more preferred DISTVERSION and take MAINTAINER'ship due three consecutive timeouts.

Changelog since 2.8.1:

https://github.com/SmileyChris/easy-thumbnails/blob/2.10.1/CHANGES.rst

PR: 291710
Approved by: maintainer timeout (5+ weeks)