Queue Limiters - v2.0

• Ability to define multiple groups of limiter routers (each group will synchronize separately but duplicate simple queue names are not allowed).
• Updated versions of Django/Gunicorn and Python.
• Some bug fixes applied.

Full Changelog: v1.0...v2.0

Queue Limiters - v1.0

Update README.md

Signed-off-by: m-manar-d <161944563+m-manar-d@users.noreply.github.com>