Revert "Revert 'additional German provinces got "Reformationstag"' (#150)" (#151)
Revert "Revert 'additional German provinces got "Reformationstag"' (#150)" (#151)

This reverts commit 2cf26ca7e3c842879502e561028526f2d577359d.
ryanss/holidays.py,ryanss/python-holidays,dr-prodigy/python-holidays