MdBOM seems to have issues with different Python environments

[HaRo87]

Describe the bug Using a freeze.txt file created by pip results in version key not found.

To Reproduce Steps to reproduce the behavior:

1. pip freeze > freeze.txt
2. cyclonedx-py -r -i freeze.txt -o bom.json --format=json
3. mdb generate ...

Expected behavior MdBOM should run even if Info like Version is missing.

Screenshots N.a.

System (please complete the following information):

• MdBOM version: [e.g. 0.3.0]
• Python version: [e.g. 3.8]
• OS: [Linux/MacOS]

Additional context cyclonedx-bom version 3.6.0