- update to 1.8.1:
* Remove a Sphinx reference from NEWS to fix the PyPI
description
* Add support for JMESPath: you can now create a selector for a
JSON document and call ``Selector.jmespath()``.
* Selectors can now be constructed from ``bytes`` (using the
``body`` and ``encoding`` arguments) instead of ``str``
(using the ``text`` argument), so that there is no internal
conversion from ``str`` to ``bytes`` and the memory
usage is lower.
* Typing improvements
* The ``pkg_resources`` module (which was absent from the
requirements) is no longer used
* New requirements:
* ``jmespath``
* ``typing_extensions`` (on Python 3.7)

- Initial package build.