update/fix pydantic for testing

[orbeckst]

The tests for the MDAKit #41 fail because some issues with pydantic. See also MDAnalysis/MDAKits#47 (comment) .

==================================== ERRORS ====================================
_________________ ERROR collecting mdsapt/tests/test_config.py _________________
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/runner.py:341: in from_call
    result: Optional[TResult] = func()
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/runner.py:372: in <lambda>
    call = CallInfo.from_call(lambda: list(collector.collect()), "collect")
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/python.py:531: in collect
    self._inject_setup_module_fixture()
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/python.py:545: in _inject_setup_module_fixture
    self.obj, ("setUpModule", "setup_module")
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/python.py:310: in obj
    self._obj = obj = self._getobj()
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/python.py:528: in _getobj
    return self._importtestmodule()
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/python.py:617: in _importtestmodule
    mod = import_path(self.path, mode=importmode, root=self.config.rootpath)
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/_pytest/pathlib.py:567: in import_path
    importlib.import_module(module_name)
/usr/share/miniconda3/envs/test/lib/python3.9/importlib/__init__.py:127: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:1030: in _gcd_import
    ???
<frozen importlib._bootstrap>:1007: in _find_and_load
    ???
<frozen importlib._bootstrap>:972: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:228: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:1030: in _gcd_import
    ???
<frozen importlib._bootstrap>:1007: in _find_and_load
    ???
<frozen importlib._bootstrap>:972: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:228: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:1030: in _gcd_import
    ???
<frozen importlib._bootstrap>:1007: in _find_and_load
    ???
<frozen importlib._bootstrap>:986: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:680: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:850: in exec_module
    ???
<frozen importlib._bootstrap>:228: in _call_with_frames_removed
    ???
mdsapt/__init__.py:8: in <module>
    from .config import Config, load_from_yaml_file
mdsapt/config.py:132: in <module>
    class RangeFrameSelection(BaseModel):
mdsapt/config.py:145: in RangeFrameSelection
    @root_validator()
/usr/share/miniconda3/envs/test/lib/python3.9/site-packages/pydantic/deprecated/class_validators.py:228: in root_validator
    raise PydanticUserError(
E   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`.
E   
E   For further information visit https://errors.pydantic.dev/2.3/u/root-validator-pre-skip

[ALescoulie]

I'll get started on this once my MDA pull request is finished, I haven't really touched this project in a while

[ALescoulie]

I just merged a fix to this issue written by @ifd3f. She determined that there was an issue with a transitive dependency issue with pydantic as well as root_validator being deprecated. I'll do a release to patch this issue today. Once MD-SAPT is installable we can add it to the MDAKits repo. Sorry for the delay in fixing this, we'll get this wrapped up soon!

[ALescoulie]

I forgot to close this issues earlier but this was fixed by @ifd3f in v2.0.3. We also have a conda-forge deployment, so I'll make sure to finish the registration process.