* Remove redundant Python 2 code
* Use Python 3.2 as base version
* Use Python 3.3 as base version
* Use Python 3.4 as base version
* Use Python 3.5 as base version
* Use Python 3.6 as base version
* Use Python 3.7 as base version
* Use Python 3.8 as base version
* Use Python 3.9 as base version
* Add annotationlib for Python 3.14
* Fix syntax error