pytest-ordering + formatter uniqueness check

[rlskoeser]

follow up to #2 — adds pytest-ordering and a failing test for non-unique formatter subclass

[codecov[bot]]

Codecov Report

Merging #47 (acc1e5d) into main (79efc4d) will increase coverage by 0.11%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #47      +/-   ##
==========================================
+ Coverage   97.29%   97.41%   +0.11%     
==========================================
  Files           4        4              
  Lines         111      116       +5     
==========================================
+ Hits          108      113       +5     
  Misses          3        3              

Impacted Files	Coverage Δ
tests/test_dateformat/test_base.py	100.00% <100.00%> (ø)

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