Python-inspector

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- Change Output Format to look like ScanCode-Toolkit 68
https://github.com/nexB/python-inspector/issues/68 , we have removed
"requirements" from the ouptut and added a new field "files".

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- Correct version reporting 70
https://github.com/nexB/python-inspector/issues/70 .

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- Enable live evaluation of the "setup.py" that use computed arguments.
When this occurs, a live evaluation of the Python code is the only working
solution short of a full installation. Because this can be a security issue,
there is a new "--analyze-setup-py-insecurely" command line option to enable this feature.
Note that this not more insecure than actually installing a PyPI package.
- Add metadata for packages.

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- Add --version option.

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- Add support for setup.py

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- Ensure to filter out top level dependencies on the basis of their environment markers
- Do not ignore files on basis of name