Log Message:
py-pybtex-docutils: update to 1.0.1.

1.0.1 (in development)
----------------------

* Add py.typed so mypy finds the type annotations.

* Switch to github actions for regression testing.

1.0.0 (15 January 2021)
-----------------------

* Drop Python 2.7, 3.4, and 3.5 support.

* Add type annotations.

* Add support for sub and sup tags.