Update twine to 1.15.0

[pyup-bot]

This PR updates twine from 1.11.0 to 1.15.0.

Changelog

1.15.0

* :feature:`488` Improved output on ``check`` command:
Prints a message when there are no distributions given to check.
Improved handling of errors in a distribution's markup, avoiding
messages flowing through to the next distribution's errors.

1.14.0

* :feature:`456` Better error handling and gpg2 fallback if gpg not available.
* :bug:`341` Fail more gracefully when encountering bad metadata
* :feature:`459` Show Warehouse URL after uploading a package
* :feature:`310` Now provide a more meaningful error on redirect during upload.

1.13.0

* :bug:`452 major` Restore prompts while retaining support for suppressing
prompts.
* :bug:`447 major` Avoid requests-toolbelt to 0.9.0 to prevent attempting to
use
openssl when it isn't available.
* :feature:`427` Add disable_progress_bar option to disable tqdm.
* :feature:`426` Allow defining an empty username and password in .pypirc.
* :bug:`441 major` Only install pyblake2 if needed.
* :bug:`444 major` Use io.StringIO instead of StringIO.
* :bug:`436 major` Use modern Python language features.
* :support:`439` Refactor tox env and travis config.
* :bug:`435 major` Specify python_requires in setup.py
* :bug:`432 major` Use https URLs everywhere.
* :bug:`428 major` Fix --skip-existing for Nexus Repos.
* :feature:`419` Support keyring.get_credential.
* :feature:`418` Support keyring.get_username_and_password.
* :bug:`421 major` Remove unnecessary usage of readme_render.markdown.
* :feature:`416` Add Python 3.7 to classifiers.
* :bug:`412 major` Don't crash if there's no package description.
* :bug:`408 major` Fix keyring support.

1.12.1

* :bug:`404` Fix regression with upload exit code

1.12.0

* :feature:`395 major` Add ``twine check`` command to check long description
* :feature:`392 major` Drop support for Python 3.3
* :feature:`363` Empower ``--skip-existing`` for Artifactory repositories
* :bug:`367 major` Avoid MD5 when Python is compiled in FIPS mode

Links

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

[codecov-io]

Codecov Report

Merging #99 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #99   +/-   ##
=======================================
  Coverage   48.25%   48.25%           
=======================================
  Files          10       10           
  Lines         887      887           
  Branches      129      129           
=======================================
  Hits          428      428           
  Misses        411      411           
  Partials       48       48

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[pyup-bot]

Closing this in favor of #101