extend query_all_versions to resource map and data objects #155
Description
query_all_versions as currently constructed only queries metadata. For instance this query returns a blank data frame:
datamgmt::query_all_versions(adc_prod, "resource_map_urn:uuid:a3784690-300e-4041-bd30-5d9b47759903", fields = "submitter")
It would be great to extend this to query resource map and data objects, along with some error handling for blank fields (for instance a resource map will not return a northBoundingCoordinate).
Some unit tests for these cases would be great too (resource map, data, and catching blank fields)