Make dot density plots
Arguments
- shp
- input shp with - sfgeometry.
- cols
- < - tidy-select> columns to produce dots for.
- engine
- backend to use. Default is - engine_terra.
- divisor
- Number of people per dot. Default is 250. 
- min_point
- Minimum number of people to generate one dot. Defaults to 10% of the divisor. 
