Update psutil to 5.4.4

[pyup-bot]

This PR updates psutil from 5.4.3 to 5.4.4.

Changelog

5.4.4

=====

2018-04-13

**Enhancements**

- 1239_: [Linux] expose kernel "slab" memory for psutil.virtual_memory().
(patch by Maxime Mouial)

**Bug fixes**

- 694_: [SunOS] cmdline() could be truncated at the 15th character when
reading it from /proc. An extra effort is made by reading it from process
address space first.  (patch by Georg Sauthoff)
- 771_: [Windows] cpu_count() (both logical and physical) return a wrong
(smaller) number on systems using process groups (> 64 cores).
- 771_: [Windows] cpu_times(percpu=True) return fewer CPUs on systems using
process groups (> 64 cores).
- 771_: [Windows] cpu_stats() and cpu_freq() may return incorrect results on
systems using process groups (> 64 cores).
- 1193_: [SunOS] Return uid/gid from /proc/pid/psinfo if there aren't
enough permissions for /proc/pid/cred.  (patch by Georg Sauthoff)
- 1194_: [SunOS] Return nice value from psinfo as getpriority() doesn't
support real-time processes.  (patch by Georg Sauthoff)
- 1194_: [SunOS] Fix double free in psutil_proc_cpu_num().  (patch by Georg
Sauthoff)
- 1194_: [SunOS] Fix undefined behavior related to strict-aliasing rules
and warnings.  (patch by Georg Sauthoff)
- 1210_: [Linux] cpu_percent() steal time may remain stuck at 100% due to Linux
erroneously reporting a decreased steal time between calls. (patch by Arnon
Yaari)
- 1216_: fix compatibility with python 2.6 on Windows (patch by Dan Vinakovsky)
- 1222_: [Linux] Process.memory_full_info() was erroneously summing "Swap:" and
"SwapPss:". Same for "Pss:" and "SwapPss". Not anymore.
- 1224_: [Windows] Process.wait() may erroneously raise TimeoutExpired.
- 1238_: [Linux] sensors_battery() may return None in case battery is not
listed as "BAT0" under /sys/class/power_supply.
- 1240_: [Windows] cpu_times() float loses accuracy in a long running system.
(patch by stswandering)
- 1245_: [Linux] sensors_temperatures() may fail with IOError "no such file".
- 1255_: [FreeBSD] swap_memory() stats were erroneously represented in KB.
(patch by Denis Krienbühl)

**Backward compatibility**

- 771_: [Windows] cpu_count(logical=False) on Windows XP and Vista is no
longer supported and returns None.

Links

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

[pyup-bot]

Closing this in favor of #177