[ BUG ] Support module imports

[jshcodes]

Describe the bug
The default pattern for leveraging FalconPy within your project involves installing the Python package from the Python Package Index (PyPI). For users that wish to include the contents of the src folder (from the repo) within their projects, they will receive a ModuleNotFound error if they do not have the simplejson package installed locally to the user.

To Reproduce
Synchronize the FalconPy repo, then copy the src/falconpy folder into the root of your project. When you try to run your project, you will receive a ModuleNotFound error.

Expected behavior
Import is successful, and the developer is able to leverage the FalconPy library as normal.

Environment (please complete the following information):

• OS: All Supported
• Python: All Supported
• FalconPy: 1.2.5 - 1.3.2

Additional context
Thanks to @tsullivan06 for identifying and reporting this issue.