Update decorator to 4.3.2

[pyup-bot]

This PR updates decorator from 4.3.0 to 4.3.2.

Changelog

### 4.3.2 ``` Accepted a patch from Sylvain Marie (https://github.com/smarie): now the decorator module can decorate generator functions by preserving their being generator functions. Set `python_requires='>=2.6, !=3.0.*, !=3.1.*'` in setup.py, as suggested by https://github.com/hugovk. ``` ### 4.3.1 ``` Added a section "For the impatient" to the README, addressing an issue raised by Amir Malekpour. Added support for Python 3.7. Now the path to the decorator module appears in the tracebacks, as suggested by an user at EuroPython 2018. ```

Links

- PyPI: https://pypi.org/project/decorator - Changelog: https://pyup.io/changelogs/decorator/ - Repo: https://github.com/micheles/decorator

[codecov[bot]]

Codecov Report

Merging #174 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #174   +/-   ##
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  Coverage   71.86%   71.86%           
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  Files           6        6           
  Lines         455      455           
  Branches       25       25           
=======================================
  Hits          327      327           
  Misses        117      117           
  Partials       11       11

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