Log Message:
py-feedgenerator: update to 2.1.0.

FeedGenerator 2.1.0

Modernize and improve tests (#32 & #34 — thanks to @venthur)
Drop support for Python 3.6 and test on 3.10 & 3.11 (#35 — thanks to @hugovk)
Exclude tests_feedgenerator/__pycache__ from distribution (#33 — thanks to \ 
@BenSturmfels)

FeedGenerator 2.0.0

Add preliminary support for adding images to feeds
Update code for Python 3.6+
Drop support for Python 2.7
Fix double subtitles if both description & subtitle are provided

FeedGenerator 1.9.2

Use description field as subtitle for Atom feeds, if provided (#23)
Update list of explicitly-supported Python versions to 3.6 – 3.9