python-ptr-20.2.26-bp153.1.14

- Update to 20.2.26:
  - Add support for passing `--system-site-packages` during venv creation - PR: #80
  - Add ability to create partial `.ptrconfig` files - PR: #83
  - Use native recursive file search for black and flake8 - PR: #81
  - Fix documentation for some new arguments - Thanks @omikader
  - Windows now defaults to updating pip + setuptools
  - Rely on setting current working directory with subprocess and remove coverage file environment setting
  - f-string everything via [flynt](https://pypi.org/project/flynt/) now we're >= 3.6
  - Enable pyre for Python 3.8 now it's fully supported

- Conflict with pytest-runner as we provide same file on the disk

- Activate test suite
- Update to v19.11.21

- Initial spec for v19.3.5