Update green to 2.16.0

[pyup-bot]

This PR updates green from 2.13.0 to 2.16.0.

Changelog

2.16.0

25 Apr 2019

- Added `-m/--minimum-coverage` to print a message and exit nonzero if a
certain coverage percentage isn't met. Resolves 135.
- Added `-g/--cov-config-file` to pass through a custom coverage config file
location.  Note that if you do not specify this option, coverage already
looks for its config files in the standard locations, this just adds the
option to specify a specific, custom config file. Resolves 168.

2.15.0

11 Apr 2019

- Added `-j/--junit-report` to generate an JUnit/XML test report.
Contributed by fchauvel in 204. Resolves 104.

2.14.2

4 Apr 2019

- Add an .encoding attribute to the wrapped sys.stdout so that things like
z3 which expect it to be present don't crash. Resolves 203.

2.14.1

21 Mar 2019

- Removed a redundant optional dependency that was already a required
dependency.  Thanks to AndreGuerra123, GjjvdBurg, and yelectric for
researching this.  Resolves 202.

2.14.0

15 Mar 2019

- Added `-U/--disable-unidecode` to disable using unidecode to convert test
output from unicode to ascii on Windows. Note that this conversion was
done to work around some difficult-to-debug crashes on Windows, so using
this option has a possibility of re-introducing those crashes. Resolves 201.

2.13.1

11 Feb 2019

- Tested Green with Django 2.1.5 -- it seems to work just fine. Something
must have changed between Django 2.0.0 and 2.1.5 that eliminated the
problem we were having.

- Properly close the version file after reading it so it doesn't leave the
file handle open for the duration of Green running. Contributed by
Nickolas Grigoriadis in 200.

- Drop official support for Python 3.4, though Green will probably continue to
work for Python 3.4 for some years before something actually breaks.

- Remove code supporting Python 3.3. We dropped official support in 2015.

- Drop termstyle dependency in favor of using only colorama. Contributed by
Ogaday in 199 to resolve 186.

- Show number of processes used in test summary. Contributed in 198 by Ogaday
to resolve 85.

- CI fixes/improvements - the world keeps changing.

- Some typo fixes in README.md and help output

Links

• PyPI: https://pypi.org/project/green
• Changelog: https://pyup.io/changelogs/green/
• Repo: https://github.com/CleanCut/green/tarball/2.16.0

[pyup-bot]

Closing this in favor of #52