Pydantic versioning and general maintenance.

[maclandrol]

Changelogs

• fixes testing issues with Molecular transformer dataframe input #77 which introduces panda dataframe as supported input datatype.
• support auto 2D array numpy conversion in transform rather than call only to be compatible with sklearn interface on pipeline when possible
• pydantic minimum version for model store on pypi installation Cannot download pretrained model (GCSFS failed)  #61

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Checklist:

• Was this PR discussed in an issue? It is recommended to first discuss a new feature into a GitHub issue before opening a PR.
• Add tests to cover the fixed bug(s) or the new introduced feature(s) (if appropriate).
• Update the API documentation if a new function is added, or an existing one is deleted. Eventually consider making a new tutorial for new features.
• Write concise and explanatory changelogs below.
• If possible, assign one of the following labels to the PR: feature, fix or test (or ask a maintainer to do it for you).

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[jstlaurent]

👍