chore: add pydantic v2 as dev dependency

[guacs]

Pull Request Checklist

• New code has 100% test coverage
• (If applicable) The prose documentation has been updated to reflect the changes introduced by this PR
• (If applicable) The reference documentation has been updated to reflect the changes introduced by this PR

Description

• update the version in pyproject.toml
• add pydantic v2 as a dev dependency without which poetry will install pydantic v1 since piccolo has a <2.0 constraint

[provinzkraut]

It looks like this doesn't work because of the other constraints we have.

[guacs]

It looks like this doesn't work because of the other constraints we have.

Hm..maybe pydantic needs to be removed first before installing v1. Let me test the CI with those changes locally.

[cofin]

Maybe this gets rolled into the PDM swap?

[cofin]

@guacs I think we can close this now that we've moved to PDM. I'm pretty sure it will get installed by default now. Thoughts?

[guacs]

@guacs I think we can close this now that we've moved to PDM. I'm pretty sure it will get installed by default now. Thoughts?

Agreed.