> A feature complete Python text case conversion library

I suspect you mean "featureful", "full-featured" or similar[1]—"feature complete" means that you're not going to add any more features.

[1] https://english.stackexchange.com/questions/393517/what-do-y...

Thank you for the clarification! I appreciate your input. I've updated the wording to "feature-rich" to better convey the intended meaning. Your feedback is valuable!