`convert_path` is not part of setuptools API and will be removed

[abravalheri]

Importing setuptools.convert_path has been deprecated for almost 2 years and is about to be removed.

https://github.com/zeriontech/defi-sdk-py/blob/d7a4a5ae560bde6df5ee2bda386690e810b06852/setup.py#L2

In the past setuptools would import convert_path from one of its dependencies for internal use[^1], but that is no longer true.

[^1]: So it was not part of its public API, but rather an import side effect.