[bug] Pin pydantic to < 2.0

[jeffkinnison]

When installing Ludwig in a new env, transformers will raise the following error

RuntimeError: Failed to import transformers.modeling_utils because of the following error (look up to see its traceback):
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`.

transformers requires pydantic 1.x, however pydantic 2.x is being installed. More details can be found in this issue. This update pins pydantic to 1.x while transformers is being updated.

[arnavgarg1]

Nice, great catch!

[jeffkinnison]

Thanks to @ksbrar for surfacing this! I opened this as a test bed to see if there are any other packages that require pydantic 2.x.

[github-actions]

Unit Test Results

  6 files  +  3    6 suites  +3   1h 0m 54s ⏱️ + 9m 0s
34 tests +  4  29 ✔️ +  4    5 💤 ±0  0 ❌ ±0 
88 runs  +36  72 ✔️ +27  16 💤 +9  0 ❌ ±0 

Results for commit abf66cd. ± Comparison against base commit 756ddf5.