v0.3.6 - 2020-07-23

This release introduces a new concept of Constraints, which allow the user to define
special relationships between columns that will not be handled via modeling.

This is done via a new sdv.constraints subpackage which defines some well-known pre-defined
constraints, as well as a generic framework that allows the user to customize the constraints
to their needs as much as necessary.

New Features

• Support for Constraints - Issue #169 by @csala