Log Message:
py-pip: updated to 20.2.2

20.2.2

Bug Fixes
- Only attempt to use the keyring once and if it fails, don't try again.
  This prevents spamming users with several keyring unlock prompts when they
  cannot unlock or don't want to do so.
- Fix regression that distributions in system site-packages are not correctly
  found when a virtual environment is configured with ``system-site-packages``
  on.
- Disable caching for range requests, which causes corrupted wheels
  when pip tries to obtain metadata using the feature ``fast-deps``.
- Always use UTF-8 to read ``pyvenv.cfg`` to match the built-in ``venv``.
- 2020 Resolver: Correctly handle marker evaluation in constraints and exclude
  them if their markers do not match the current environment.