Add DateColumn

[lrljoe]

This adds a new DateColumn, which can receive either DateTime objects, or strings

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (69a64c3) 89.08% compared to head (868bef0) 89.17%.

❗ Current head 868bef0 differs from pull request most recent head d0c8dd8. Consider uploading reports for the commit d0c8dd8 to get more accurate results

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #1589      +/-   ##
=============================================
+ Coverage      89.08%   89.17%   +0.08%     
- Complexity      1307     1317      +10     
=============================================
  Files             99      102       +3     
  Lines           3078     3103      +25     
=============================================
+ Hits            2742     2767      +25     
  Misses           336      336              

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