Addressing Issue#76. Adding start_date, end_date parameters to the _get_json_for_random_dates function. #91
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Based on: #76
Extended function "_get_json_for_random_dates" to accept optional start_date and\or end_date parameters.
If only
start_dateis provided - thecurrent datewill be used as anend_date.if only
end_dateprovided -6/16/1995will be used as astart_date.The function will raise value error if:
countnumber exceeds the number of dates in the provided rangestart dateis after theend dateUpdated readme.md to reflect my changes.