Update html2text to 2020.1.16

[pyup-bot]

This PR updates html2text from 2019.8.11 to 2020.1.16.

Changelog

2020.1.16

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* Add type annotations.
* Add support for Python 3.8.
* Performance improvements when ``wrap_links`` is ``False`` (the default).
* Configure setuptools using setup.cfg.

2019.9.26

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* Fix long blockquotes wrapping.
* Remove the trailing whitespaces that were added after wrapping list items & blockquotes.
* Remove support for Python ≤ 3.4. Now requires Python 3.5+.
* Fix memory leak when processing a document containing a ``<abbr>`` tag.
* Fix ``AttributeError`` when reading text from stdin.
* Fix ``UnicodeEncodeError`` when writing output to stdout.

Links

• PyPI: https://pypi.org/project/html2text
• Changelog: https://pyup.io/changelogs/html2text/
• Repo: https://github.com/Alir3z4/html2text/