Replaced deprecated cgi package

[atapin]

Description

Replaced deprecated cgi package with the code suggested in #107

Motivation and Context

cgi is marked as deprecated since python 3.11, and will be removed in python 3.13
Fixes #107

How has this been tested?

Provided test coverage for new utility function.
Ran all tests.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.