Pythx

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- Add an auth check override to handle situations where only the access token is given

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- Update :code:`mythx-models` to 1.3.1

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- Update :code:`mythx-models` to 1.3.0

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- Add `mythx-models <https://github.com/dmuhs/mythx-models>`_ integration

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- Add debug flag to CLI
- Add support for the :code:`clientToolName` response field
- Add support for the new source list format validation
- Update the bumpversion expression to support black formatting

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- Add main docstring description