Update requests to 2.19.1

[pyup-bot]

This PR updates requests from 2.13.0 to 2.19.1.

Changelog

2.19.1

+++++++++++++++++++

**Bugfixes**

- Fixed issue where status_codes.py's ``init`` function failed trying to append to
a ``__doc__`` value of ``None``.

2.19.0

+++++++++++++++++++

**Improvements**

- Warn user about possible slowdown when using cryptography version < 1.3.4
- Check for invalid host in proxy URL, before forwarding request to adapter.
- Fragments are now properly maintained across redirects. (RFC7231 7.1.2)
- Removed use of cgi module to expedite library load time.
- Added support for SHA-256 and SHA-512 digest auth algorithms.
- Minor performance improvement to ``Request.content``.
- Migrate to using collections.abc for 3.7 compatibility.

**Bugfixes**

- Parsing empty ``Link`` headers with ``parse_header_links()`` no longer return one bogus entry.
- Fixed issue where loading the default certificate bundle from a zip archive
would raise an ``IOError``.
- Fixed issue with unexpected ``ImportError`` on windows system which do not support ``winreg`` module.
- DNS resolution in proxy bypass no longer includes the username and password in
the request. This also fixes the issue of DNS queries failing on macOS.
- Properly normalize adapter prefixes for url comparison.
- Passing ``None`` as a file pointer to the ``files`` param no longer raises an exception.
- Calling ``copy`` on a ``RequestsCookieJar`` will now preserve the cookie policy correctly.

**Dependencies**

- We now support idna v2.7.
- We now support urllib3 v1.23.

2.18.4

+++++++++++++++++++

**Improvements**

- Error messages for invalid headers now include the header name for easier debugging

**Dependencies**

- We now support idna v2.6.

2.18.3

+++++++++++++++++++

**Improvements**

- Running ``$ python -m requests.help`` now includes the installed version of idna.

**Bugfixes**

- Fixed issue where Requests would raise ``ConnectionError`` instead of
``SSLError`` when encountering SSL problems when using urllib3 v1.22.

2.18.2

+++++++++++++++++++

**Bugfixes**

- ``requests.help`` no longer fails on Python 2.6 due to the absence of
``ssl.OPENSSL_VERSION_NUMBER``.

**Dependencies**

- We now support urllib3 v1.22.

2.18.1

+++++++++++++++++++

**Bugfixes**

- Fix an error in the packaging whereby the ``*.whl`` contained incorrect data
that regressed the fix in v2.17.3.

2.18.0

+++++++++++++++++++

**Improvements**

- ``Response`` is now a context manager, so can be used directly in a ``with`` statement
without first having to be wrapped by ``contextlib.closing()``.

**Bugfixes**

- Resolve installation failure if multiprocessing is not available
- Resolve tests crash if multiprocessing is not able to determine the number of CPU cores
- Resolve error swallowing in utils set_environ generator

2.17.3

+++++++++++++++++++

**Improvements**

- Improved ``packages`` namespace identity support, for monkeypatching libraries.

2.17.2

+++++++++++++++++++

**Improvements**

- Improved ``packages`` namespace identity support, for monkeypatching libraries.

2.17.1

+++++++++++++++++++

**Improvements**

- Improved ``packages`` namespace identity support, for monkeypatching libraries.

2.17.0

+++++++++++++++++++

**Improvements**

- Removal of the 301 redirect cache. This improves thread-safety.

2.16.5

+++++++++++++++++++

- Improvements to ``$ python -m requests.help``.

2.16.4

+++++++++++++++++++

- Introduction of the ``$ python -m requests.help`` command, for debugging with maintainers!

2.16.3

+++++++++++++++++++

- Further restored the ``requests.packages`` namespace for compatibility reasons.

2.16.2

+++++++++++++++++++

- Further restored the ``requests.packages`` namespace for compatibility reasons.

No code modification (noted below) should be necessary any longer.

2.16.1

+++++++++++++++++++

- Restored the ``requests.packages`` namespace for compatibility reasons.
- Bugfix for ``urllib3`` version parsing.

**Note**: code that was written to import against the ``requests.packages``
namespace previously will have to import code that rests at this module-level
now.

For example::

 from requests.packages.urllib3.poolmanager import PoolManager

Will need to be re-written to be::

 from requests.packages import urllib3
 urllib3.poolmanager.PoolManager

Or, even better::

 from urllib3.poolmanager import PoolManager

2.16.0

+++++++++++++++++++

- Unvendor ALL the things!

2.15.1

+++++++++++++++++++

- Everyone makes mistakes.

2.15.0

+++++++++++++++++++

**Improvements**

- Introduction of the ``Response.next`` property, for getting the next
``PreparedResponse`` from a redirect chain (when ``allow_redirects=False``).
- Internal refactoring of ``__version__`` module.

**Bugfixes**

- Restored once-optional parameter for ``requests.utils.get_environ_proxies()``.

2.14.2

+++++++++++++++++++

**Bugfixes**

- Changed a less-than to an equal-to and an or in the dependency markers to
widen compatibility with older setuptools releases.

2.14.1

+++++++++++++++++++

**Bugfixes**

- Changed the dependency markers to widen compatibility with older pip
releases.

2.14.0

+++++++++++++++++++

**Improvements**

- It is now possible to pass ``no_proxy`` as a key to the ``proxies``
dictionary to provide handling similar to the ``NO_PROXY`` environment
variable.
- When users provide invalid paths to certificate bundle files or directories
Requests now raises ``IOError``, rather than failing at the time of the HTTPS
request with a fairly inscrutable certificate validation error.
- The behavior of ``SessionRedirectMixin`` was slightly altered.
``resolve_redirects`` will now detect a redirect by calling
``get_redirect_target(response)`` instead of directly
querying ``Response.is_redirect`` and ``Response.headers['location']``.
Advanced users will be able to process malformed redirects more easily.
- Changed the internal calculation of elapsed request time to have higher
resolution on Windows.
- Added ``win_inet_pton`` as conditional dependency for the ``[socks]`` extra
on Windows with Python 2.7.
- Changed the proxy bypass implementation on Windows: the proxy bypass
check doesn't use forward and reverse DNS requests anymore
- URLs with schemes that begin with ``http`` but are not ``http`` or ``https``
no longer have their host parts forced to lowercase.

**Bugfixes**

- Much improved handling of non-ASCII ``Location`` header values in redirects.
Fewer ``UnicodeDecodeErrors`` are encountered on Python 2, and Python 3 now
correctly understands that Latin-1 is unlikely to be the correct encoding.
- If an attempt to ``seek`` file to find out its length fails, we now
appropriately handle that by aborting our content-length calculations.
- Restricted ``HTTPDigestAuth`` to only respond to auth challenges made on 4XX
responses, rather than to all auth challenges.
- Fixed some code that was firing ``DeprecationWarning`` on Python 3.6.
- The dismayed person emoticon (``/o\\``) no longer has a big head. I'm sure
this is what you were all worrying about most.


**Miscellaneous**

- Updated bundled urllib3 to v1.21.1.
- Updated bundled chardet to v3.0.2.
- Updated bundled idna to v2.5.
- Updated bundled certifi to 2017.4.17.

Links

• PyPI: https://pypi.org/project/requests
• Changelog: https://pyup.io/changelogs/requests/
• Homepage: http://python-requests.org

[scrutinizer-notifier]

The inspection completed: No new issues

[pyup-bot]

Closing this in favor of #195