BarStatistic update

[Mattriks]

• I've added and/or updated the unit tests
• I've run the regression tests
• I've built the docs and confirmed these changes don't cause new errors

This PR

• Fixes the main issue in Geom.bar together with xmin, xmax  #1443

[codecov-commenter]

Codecov Report

Merging #1446 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1446   +/-   ##
=======================================
  Coverage   89.37%   89.38%           
=======================================
  Files          39       39           
  Lines        4378     4379    +1     
=======================================
+ Hits         3913     3914    +1     
  Misses        465      465           

Impacted Files	Coverage Δ
src/statistics.jl	96.44% <100.00%> (+<0.01%)	⬆️

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