Bump to 2.2.1

[marksweb]

No description provided.

[codecov]

Codecov Report

Merging #1295 (c592bfa) into master (d56991e) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1295   +/-   ##
=======================================
  Coverage   72.21%   72.21%           
=======================================
  Files          72       72           
  Lines        3239     3239           
  Branches      563      563           
=======================================
  Hits         2339     2339           
  Misses        734      734           
  Partials      166      166           

Impacted Files	Coverage Δ
filer/__init__.py	100.00% <100.00%> (ø)

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