Update py to 1.9.0

[pyup-bot]

This PR updates py from 1.4.34 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.

1.8.2

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

- On Windows, ``py.path.local``s which differ only in case now have the same
Python hash value. Previously, such paths were considered equal but had
different hashes, which is not allowed and breaks the assumptions made by
dicts, sets and other users of hashes.

1.8.1

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

- Handle ``FileNotFoundError`` when trying to import pathlib in ``path.common``
on Python 3.4 (207).

- ``py.path.local.samefile`` now works correctly in Python 3 on Windows when dealing with symlinks.

1.8.0

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

- add ``"importlib"`` pyimport mode for python3.5+, allowing unimportable test suites
to contain identically named modules.

- fix ``LocalPath.as_cwd()`` not calling ``os.chdir()`` with ``None``, when
being invoked from a non-existing directory.

1.7.0

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

- fix 174: use ``shutil.get_terminal_size()`` in Python 3.3+ to determine the size of the
terminal, which produces more accurate results than the previous method.

- fix pytest-dev/pytest2042: introduce new ``PY_IGNORE_IMPORTMISMATCH`` environment variable
that suppresses ``ImportMismatchError`` exceptions when set to ``1``.

1.6.0

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

- add ``TerminalWriter.width_of_current_line`` (i18n version of
``TerminalWriter.chars_on_current_line``), a read-only property
that tracks how wide the current line is, attempting to take
into account international characters in the calculation.

1.5.4

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

- fix pytest-dev/pytest3451: don't make assumptions about fs case sensitivity
in ``make_numbered_dir``.

1.5.3

=====

- fix 179: ensure we can support 'from py.error import ...'

1.5.2

=====

- fix 169, 170: error importing py.log on Windows: no module named ``syslog``.

1.5.1

=====

- fix 167 - prevent pip from installing py in unsupported Python versions.

1.5.0

=====

NOTE: **this release has been removed from PyPI** due to missing package
metadata which caused a number of problems to py26 and py33 users.
This issue was fixed in the 1.5.1 release.

- python 2.6 and 3.3 are no longer supported
- deprecate py.std and remove all internal uses
- fix 73 turn py.error into an actual module
- path join to / no longer produces leading double slashes
- fix 82 - remove unsupportable aliases
- fix python37 compatibility of path.sysfind on windows by correctly replacing vars
- turn iniconfig and apipkg into vendored packages and ease de-vendoring for distributions
- fix 68 remove invalid py.test.ensuretemp references
- fix 25 - deprecate path.listdir(sort=callable)
- add ``TerminalWriter.chars_on_current_line`` read-only property that tracks how many characters
have been written to the current line.

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 #146