[pyup-bot]

This PR updates py from 1.8.2 to 1.9.0.

Changelog

1.9.0

==================

- Add type annotation stubs for the following modules:

* ``py.error``
* ``py.iniconfig``
* ``py.path`` (not including SVN paths)
* ``py.io``
* ``py.xml``

There are no plans to type other modules at this time.

The type annotations are provided in external .pyi files, not inline in the
code, and may therefore contain small errors or omissions. If you use ``py``
in conjunction with a type checker, and encounter any type errors you believe
should be accepted, please report it in an issue.

Links

• PyPI: https://pypi.org/project/py
• Changelog: https://pyup.io/changelogs/py/
• Docs: https://py.readthedocs.io/

[pyup-bot]

Closing this in favor of #44