Update to pydantic v2

I am running into issues using deeppavlov in combination with other packages that use pydantic>2, as deeppavlov has the requirement pydantic<2.

I saw this post https://github.com/deeppavlov/DeepPavlov/pull/1665 which seemed to indicate that the dependency could be updated, but currently the latest release still specificies pydantic<2.

Would it be possible to update the pydantic dependency?