fix ponos support in parse dates

Codecov Report

Merging #280 into master will increase coverage by <.01%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #280      +/-   ##
==========================================
+ Coverage   79.71%   79.71%   +<.01%     
==========================================
  Files         162      162              
  Lines        9686     9687       +1     
==========================================
+ Hits         7721     7722       +1     
  Misses       1965     1965

Impacted Files	Coverage Δ
...index/documents/management/commands/parse_dates.py	90.9% <100%> (+0.21%)

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added 3 commits

• b22f4b6d...941bcbb3 - 2 commits from branch master
• f390cf01 - super().add_arguments(parser) missing

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enabled an automatic merge when the pipeline for f390cf01 succeeds

merged

mentioned in commit 879b5eb9