upd CHANGELOG.md

Author: soltanoff

CHANGELOG.md

@@ -19,3 +19,14 @@
 * Replaced SafeConfigParser with ConfigParser
 * Replaced logger.warn with logger.warning
 
+## [2.1.0] - 2023-02-05
+
+* wxPython 4.2.0 compatibility
+* Fixed deprecation warning
+* Fixed top-level code environment
+* Modernized `setup.py`: updated and fixed installation meta
+* Modernized `version` control: rename `version.py` -> `vertion.txt`
+* Added `requirements.txt`
+* Added `.flake8` and fixed the code 
+* Added `.editorconfig`
+* Updated application resource