Update dependency pytest_mock to v3.7.0

This MR contains the following updates:

Package	Type	Update	Change
pytest_mock	ironbank-pypi	minor	3.6.1 -> 3.7.0

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Release Notes

pytest-dev/pytest-mock

v3.7.0

Compare Source

• Python 3.10 now officially supported.
• Dropped support for Python 3.6.

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