Release v2021.11.23

Version v2021.11.23

2021.11.23 (2021-11-23)
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Bug Fixes
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- Update charset-normalizer from 2.0.3 to 2.0.7, this fixes an import error on Python 3.6.  _
- Fix a bug of deleting a virtualenv that is not managed by Pipenv.  _
- Fix a bug that source is not added to Pipfile when index url is given with pipenv install.  _