Upgrade keyfunc to new stable release v1.0.0

[MicahParks]

What this PR does:
Upgrades the github.com/MicahParks/keyfunc to the latest stable release v1.0.0.

Which issue(s) this PR fixes:
None.

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

Merging #318 (fd0757d) into develop (aa3a55c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #318   +/-   ##
========================================
  Coverage    36.52%   36.52%           
========================================
  Files           54       54           
  Lines         3253     3253           
========================================
  Hits          1188     1188           
  Misses        1945     1945           
  Partials       120      120           

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