Relax dependencies

[panagiotiskonis]

• Relax Pandas version from >1.15 to >1.1.5 in order to fix a typo, and remove Pydantic dependency as field validation is not necessary in this package

Branch name: bugfix/2-relax-dependencies

[pietrodantuono]

I would edit this issue as follows.

What	Description
Title	Relax dependencies
Content	Relax Pandas version from >1.15 to >1.1.5 in order to fix a typo, and remove Pydantic dependency as field validation is not necessary in this package
Branch name	bugfix/2-relax-dependencies