Add significant shabbos implantation with tests#11

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pinnymz merged 3 commits intopinnymz:masterfrom

jacobshilitz:significant_shabbos

May 12, 2022

Commits on Feb 22, 2022

Add significant shabbos implantation with tests
jacobshilitz
committed

Commits on Mar 25, 2022

fix the spelling for 'shabbos' in the test method names to match the rest of the code
jacobshilitz
committed
Add change log for `significant_shabbos()`
jacobshilitz
committed