Incompatible with python3.8 and 3.7

[Logan]

Seems like you list compatibilty with python3.7+

But a few places use incorrect typing like dict[str, Any] which will break python3.8 and less.

Full error:

/home/runner/.cache/pants/named_caches/pex_root/venvs/s/ee2342a6/venv/lib/python3.8/site-packages/timescale_vector/client.py:199: in QueryParams
    def __init__(self, params: dict[str, Any]) -> None:
E   TypeError: 'type' object is not subscriptable