Update twine to 1.10.0

[pyup-bot]

This PR updates twine from 1.9.1 to 1.10.0.

Changelog

1.10.0

* :bug:`315 major` Degrade gracefully when keyring is unavailable
* :feature:`304` Reorganize & improve user & developer documentation.
* :feature:`46` Link to changelog from ``README``
* :feature:`295` Add doc building instructions
* :feature:`296` Add architecture overview to docs
* :feature:`303` Revise docs predicting future of ``twine``
* :bug:`298 major` Fix syntax highlighting in ``README``
* :bug:`299 major` Fix changelog formatting
* :bug:`200 major` Remove obsolete registration guidance
* :bug:`286 major` Fix Travis CI and test configuration
* :feature:`257` Declare support for Python 3.6
* :bug:`297 major` Fix Read the Docs, tox, Travis configuration
* :bug:`268 major` Print progress to ``stdout``, not ``stderr``
* :bug:`265 major` Fix ``--repository[-url]`` help text
* :feature:`256` Improve progressbar

Links

• PyPI: https://pypi.python.org/pypi/twine
• Changelog: https://pyup.io/changelogs/twine/
• Docs: http://twine.readthedocs.io/

[pyup-bot]

Closing this in favor of #14