Add 'city' arg to func 'bmap_get_coords()' #1
Description
Per this API document, the coordinates API call can take an optional argument for City/Prefecture. I should include a city arg to function baidugeo::bmap_get_coords(), so that users have the option of passing in a city string with the main address string.
Only tricky thing will be that the location arg of function bmap_get_coords() is vectorized, so I'm not sure if it's best to require that a character vector passed to the new arg city have the same length as the character vector passed to arg location. We could also allow for a scalar string input to arg city, and recycle it so that it's applied to each address in arg location.