ci: drop tox for Python 3.7, 3.8
Tox 3.7 and 3.8 seems to be unhappy about Python 3.9 annotations.
framework/replay/download_utils.py:108: in <module>
def download(url: str, file_path: str, headers: dict[str, str], attempts: int = 2) -> None:
E TypeError: 'type' object is not subscriptable
Edited by David Heidelberg