version 2.7.2

[seratch]

Summary

We're releasing a new patch version including a few bugfixes.
https://github.com/slackapi/python-slackclient/milestone/12?closed=1

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

Merging #731 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #731   +/-   ##
=======================================
  Coverage   85.15%   85.15%           
=======================================
  Files          22       22           
  Lines        2802     2802           
  Branches      281      281           
=======================================
  Hits         2386     2386           
  Misses        312      312           
  Partials      104      104           

Impacted Files	Coverage Δ
slack/version.py	100.00% <100.00%> (ø)

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