BUG: fix replace bug where different dtypes in a nested dict would only replace the first value
Merge pull request #6820 from cpcloud/replace-dtype-bool-fix

BUG: fix replace bug where different dtypes in a nested dict would only replace the first value
DEPR:  Deprecate DateRange [fix #6816]
Additional documentation for holiday calendars and minor correction to start/end date logic.
Merge pull request #6840 from rockg/holiday-doc

Additional documentation for holiday calendars