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

• [x] 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:

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