Deprecated Aliases to Built-In Types

[suvan-kumar]

Python Documentation - Deprecated Aliases

typing.List[] to be replaced with list[], typing.Optional[] to be replaced with x | None

[suvan-kumar]

list[] requires Python 3.9, the pipe operator for Optionals requires Python 3.10. The lower bound of TAT-C is currently Python 3.8, so this change cannot be made at the moment.

[ptgrogan]

This issue has been resolved in #141 by dropping support for Python < 3.10.