Pinned pgstac dependencies?

[duckontheweb]

Ported from stac-utils/stac-fastapi#369

Original Issue:

Hi there,
Thanks for a great set of libraries -so helpful!

One thing I encountered in getting things running locally using Docker was that some of my searches weren't working as expected - in trawling through tickets I saw there had been some recent improvements upstream in pgstac and the pypgstac dependencies. I noticed they were pinned in a few spots.

docker-compose.yaml
https://github.com/stac-utils/stac-fastapi/blob/6c22bad84422151ed2ddfe53dd5242f7f83772d3/docker-compose.yml#L68

stac_fastapi/pgstac/setup.py
https://github.com/stac-utils/stac-fastapi/blob/6c22bad84422151ed2ddfe53dd5242f7f83772d3/stac_fastapi/pgstac/setup.py#L28

Updating these to the latest resolved my issues so I was wondering if there was a reason they should be pinned or if you'd be happy to accept a PR pointing to the latest versions, or with the pin removed?

Cheers
Rowan