DOM-65441: Loosen frozendict restrictions to allow version 2.4.6

[ddl-ignacio-rossi]

Link to JIRA

DOM-65441

What issue does this pull request solve?

The frozendict restriction in the package is too strict and conflicts with 2.4.6 which conda requires to work properly.
This should also take care of #211

What is the solution?

This PR loosens the restriction from ~=2.3.8 (equivalent to >=2.3.8,<2.4) to ~=2.3 (equivalent to >=2.3,<3). See https://packaging.python.org/en/latest/specifications/version-specifiers/#compatible-release for details

Testing

I tested that installing the requirements file will install the latest 2.x frozendict

• Unit test(s)

Pull Request Reminders

• Has the changelog been updated
• Has relevant documentation been updated?
• Does the code follow [Python Style Guide] (https://black.readthedocs.io/en/stable/the_black_code_style/current_style.html)
• Are the existing unit tests still passing?
• Have new unit tests been added to cover any changes to the code?
• Has the JIRA ticket(s) been linked above?

References (optional)