Support both Pydantic v1 and v2

[ff137]

pydantic is currently pinned to <2. This PR unpins and provides support for both v1 and v2, without deprecation warnings.

Edit: fastapi_websocket_rpc, which is in the requirements here, seems to also be pinned to <2. So, this PR is contingent on this one being released first: permitio/fastapi_websocket_rpc#24. Version there is bumped to 0.1.25, so this PR is set to require fastapi_websocket_rpc~=0.1.25

[ff137]

These tests will fail until permitio/fastapi_websocket_rpc#24 is merged and published, because this PR requires fastapi_websocket_rpc~=0.1.25 (the version in aforementioned PR). Setting to draft until that's merged.

[orweis]

These tests will fail until permitio/fastapi_websocket_rpc#24 is merged and published, because this PR requires fastapi_websocket_rpc~=0.1.25 (the version in aforementioned PR). Setting to draft until that's merged.

Of course :)

[roekatz]

Same comments as in permitio/fastapi_websocket_rpc#24.
Don't worry about the versions, I'll release those once we merge.

[ff137]

@roekatz I notice there's a timeout error for one of the tests. I can't really infer from the logs what's going on there, and if it's related to the pydantic changes ...

[roekatz]

@ff137 I'll fix it separately, I don't think it's related to your changes