Update pip to 19.1.1

[pyup-bot]

This PR updates pip from 19.0.3 to 19.1.1.

Changelog

### 19.1.1 ``` =================== Features -------- - Restore ``pyproject.toml`` handling to how it was with pip 19.0.3 to prevent the need to add ``--no-use-pep517`` when installing in editable mode. (`6434 <https://github.com/pypa/pip/issues/6434>`_) Bug Fixes --------- - Fix a regression that caused `` to be quoted in pypiserver links. This interfered with parsing the revision string from VCS urls. (`6440 <https://github.com/pypa/pip/issues/6440>`_) ``` ### 19.1 ``` ================= Features -------- - Configuration files may now also be stored under ``sys.prefix`` (`5060 <https://github.com/pypa/pip/issues/5060>`_) - Avoid creating an unnecessary local clone of a Bazaar branch when exporting. (`5443 <https://github.com/pypa/pip/issues/5443>`_) - Include in pip's User-Agent string whether it looks like pip is running under CI. (`5499 <https://github.com/pypa/pip/issues/5499>`_) - A custom (JSON-encoded) string can now be added to pip's User-Agent using the ``PIP_USER_AGENT_USER_DATA`` environment variable. (`5549 <https://github.com/pypa/pip/issues/5549>`_) - For consistency, passing ``--no-cache-dir`` no longer affects whether wheels will be built. In this case, a temporary directory is used. (`5749 <https://github.com/pypa/pip/issues/5749>`_) - Command arguments in ``subprocess`` log messages are now quoted using ``shlex.quote()``. (`6290 <https://github.com/pypa/pip/issues/6290>`_) - Prefix warning and error messages in log output with `WARNING` and `ERROR`. (`6298 <https://github.com/pypa/pip/issues/6298>`_) - Using ``--build-options`` in a PEP 517 build now fails with an error, rather than silently ignoring the option. (`6305 <https://github.com/pypa/pip/issues/6305>`_) - Error out with an informative message if one tries to install a ``pyproject.toml``-style (PEP 517) source tree using ``--editable`` mode. (`6314 <https://github.com/pypa/pip/issues/6314>`_) - When downloading a package, the ETA and average speed now only update once per second for better legibility. (`6319 <https://github.com/pypa/pip/issues/6319>`_) Bug Fixes --------- - The stdout and stderr from VCS commands run by pip as subprocesses (e.g. ``git``, ``hg``, etc.) no longer pollute pip's stdout. (`1219 <https://github.com/pypa/pip/issues/1219>`_) - Fix handling of requests exceptions when dependencies are debundled. (`4195 <https://github.com/pypa/pip/issues/4195>`_) - Make pip's self version check avoid recommending upgrades to prereleases if the currently-installed version is stable. (`5175 <https://github.com/pypa/pip/issues/5175>`_) - Fixed crash when installing a requirement from a URL that comes from a dependency without a URL. (`5889 <https://github.com/pypa/pip/issues/5889>`_) - Improve handling of file URIs: correctly handle `file://localhost/...` and don't try to use UNC paths on Unix. (`5892 <https://github.com/pypa/pip/issues/5892>`_) - Fix ``utils.encoding.auto_decode()`` ``LookupError`` with invalid encodings. ``utils.encoding.auto_decode()`` was broken when decoding Big Endian BOM byte-strings on Little Endian or vice versa. (`6054 <https://github.com/pypa/pip/issues/6054>`_) - Fix incorrect URL quoting of IPv6 addresses. (`6285 <https://github.com/pypa/pip/issues/6285>`_) - Redact the password from the extra index URL when using ``pip -v``. (`6295 <https://github.com/pypa/pip/issues/6295>`_) - The spinner no longer displays a completion message after subprocess calls not needing a spinner. It also no longer incorrectly reports an error after certain subprocess calls to Git that succeeded. (`6312 <https://github.com/pypa/pip/issues/6312>`_) - Fix the handling of editable mode during installs when ``pyproject.toml`` is present but PEP 517 doesn't require the source tree to be treated as ``pyproject.toml``-style. (`6370 <https://github.com/pypa/pip/issues/6370>`_) - Fix ``NameError`` when handling an invalid requirement. (`6419 <https://github.com/pypa/pip/issues/6419>`_) Vendored Libraries ------------------ - Updated certifi to 2019.3.9 - Updated distro to 1.4.0 - Update progress to 1.5 - Updated pyparsing to 2.4.0 - Updated pkg_resources to 41.0.1 (via setuptools) Improved Documentation ---------------------- - Make dashes render correctly when displaying long options like ``--find-links`` in the text. (`6422 <https://github.com/pypa/pip/issues/6422>`_) ```

Links

- PyPI: https://pypi.org/project/pip - Changelog: https://pyup.io/changelogs/pip/ - Homepage: https://pip.pypa.io/