Update psutil to 5.6.6

[pyup-bot]

This PR updates psutil from 5.6.3 to 5.6.6.

Changelog

5.6.6

=====

2019-11-25

**Bug fixes**

- 1179_: [Linux] Process cmdline() now takes into account misbehaving processes
renaming the command line and using inappropriate chars to separate args.
- 1616_: use of Py_DECREF instead of Py_CLEAR will result in double free and
segfault (CVE).  (patch by Riccardo Schirone)
- 1619_: [OpenBSD] compilation fails due to C syntax error.  (patch by Nathan
Houghton)

5.6.5

=====

2019-11-06

**Bug fixes**

- 1615_: remove pyproject.toml as it was causing installation issues.

5.6.4

=====

2019-11-04

**Enhancements**

- 1527_: [Linux] added Process.cpu_times().iowait counter, which is the time
spent waiting for blocking I/O to complete.
- 1565_: add PEP 517/8 build backend and requirements specification for better
pip integration.  (patch by Bernát Gábor)

**Bug fixes**

- 875_: [Windows] Process' cmdline(), environ() or cwd() may occasionally fail
with ERROR_PARTIAL_COPY which now gets translated to AccessDenied.
- 1126_: [Linux] cpu_affinity() segfaults on CentOS 5 / manylinux.
cpu_affinity() support for CentOS 5 was removed.
- 1528_: [AIX] compilation error on AIX 7.2 due to 32 vs 64 bit differences.
(patch by Arnon Yaari)
- 1535_: 'type' and 'family' fields returned by net_connections() are not
always turned into enums.
- 1536_: [NetBSD] process cmdline() erroneously raise ZombieProcess error if
cmdline has non encodable chars.
- 1546_: usage percent may be rounded to 0 on Python 2.
- 1552_: [Windows] getloadavg() math for calculating 5 and 15 mins values is
incorrect.
- 1568_: [Linux] use CC compiler env var if defined.
- 1570_: [Windows] `NtWow64*` syscalls fail to raise the proper error code
- 1585_: [OSX] calling close() (in C) on possible negative integers.  (patch
by Athos Ribeiro)
- 1606_: [SunOS] compilation fails on SunOS 5.10.  (patch by vser1)

Links

• PyPI: https://pypi.org/project/psutil
• Changelog: https://pyup.io/changelogs/psutil/
• Repo: https://github.com/giampaolo/psutil

[codecov-io]

Codecov Report

Merging #928 into master will decrease coverage by 0.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #928      +/-   ##
==========================================
- Coverage   94.15%   94.02%   -0.13%     
==========================================
  Files          10       10              
  Lines         787      787              
==========================================
- Hits          741      740       -1     
- Misses         46       47       +1

Impacted Files	Coverage Δ
etcd3/watch.py	85.81% <0%> (-0.71%)	⬇️

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[pyup-bot]

Closing this in favor of #932