devel/py-fluent-logger: Update 0.9.2 → 0.11.1

Also:
 - Reorganized Makefile as per portlint, portfmt, and portclippy
 - Changed to pep517 build
 - Added pytest

Changelogs:
https://github.com/fluent/fluent-logger-python/releases/tag/v0.11.0
https://github.com/fluent/fluent-logger-python/releases/tag/v0.11.1

PR:		280522
Approved by:	edwardchuang@gmail.com (maintainer, timeout > 14 days)