Drop support for Python 3.7

[edgarrmondragon]

Description

Python 3.7 reached its EOL June 27th 2023.

This could also be an opportunity to remove the upper dependency bound and just declare support for >=3.8

Possible Solution

Use

[tool.poetry.dependencies]
python = ">=3.8"

and update dependencies accordingly so the upper bound can be removed.

Additional context

I can work on a PR if the maintainers are interested.

Additional context

No response