Updated relevent modules to support marshmallow 4. #995

[SteveMcGrath]

Description

Adjusted the relevent modules in order to support Marshmallow version 4.

Fixes #995

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Unit Tests Pass

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[amaruf-tenb]

LGTM!