FIX Version cap pydantic<2

[timkpaine]

Description

Checklists

• Add a CHANGELOG entry

---

e.g. latest pyodide build https://github.com/pyodide/pyodide/actions/runs/5427229660/jobs/9870260314

  File "/opt/hostedtoolcache/Python/3.11.2/x64/lib/python3.11/site-packages/pyodide_build/io.py", line 30, in _SourceSpec
    @pydantic.root_validator
     ^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.11.2/x64/lib/python3.11/site-packages/pydantic/deprecated/class_validators.py", line 222, in root_validator
    return root_validator()(*__args)  # type: ignore
           ^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.11.2/x64/lib/python3.11/site-packages/pydantic/deprecated/class_validators.py", line 228, in root_validator
    raise PydanticUserError(
pydantic.errors.PydanticUserError: If you use `@root_validator` with pre=False (the default) you MUST specify `skip_on_failure=True`. Note that `@root_validator` is deprecated and should be replaced with `@model_validator`.

[timkpaine]

CC @samuelcolvin / @hoodmane

[timkpaine]

pyodide <= v0.23.3 is going to be broken so if possible please release a v0.23.4 with this version restriction if pydantic 2.0 compatibility will take time

[hoodmane]

Thanks @timkpaine! I think we will release a Pyodide 0.23.4 with this and a few other backports.

[hoodmane]

Can you add a changelog entry?