Cap holidays check to end date when calculating diff

[kylekatarnls]

Fix #215

[codecov-commenter]

Codecov Report

Patch coverage: 62.50% and project coverage change: -1.12 ⚠️

Comparison is base (a6b937b) 100.00% compared to head (f492e18) 98.88%.

❗ Current head f492e18 differs from pull request most recent head c7140ec. Consider uploading reports for the commit c7140ec to get more accurate results

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Additional details and impacted files

@@              Coverage Diff              @@
##              master     #216      +/-   ##
=============================================
- Coverage     100.00%   98.88%   -1.12%     
- Complexity       351      368      +17     
=============================================
  Files             22       23       +1     
  Lines            786      804      +18     
=============================================
+ Hits             786      795       +9     
- Misses             0        9       +9     

Impacted Files	Coverage Δ
src/Exceptions/SearchLimitReached.php	0.00% <0.00%> (ø)
src/OpeningHours.php	98.28% <65.00%> (-1.72%)	⬇️
src/Helpers/DiffTrait.php	100.00% <100.00%> (ø)

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