What's Changed
* Update README.md python version by SyrexMinus in https://github.com/salute-developers/smart_app_framework/pull/167
* DPNLPF-2185: add try except for poll_kafka by SyrexMinus in https://github.com/salute-developers/smart_app_framework/pull/169
**Full Changelog**: https://github.com/salute-developers/smart_app_framework/compare/v2.3.0rc20...v2.3.0rc21