Clarify 'propertyName' behaviour in dissolve

[stevage]

Currently .dissolve() supports a property option which is a pretty limited way of saying "apply the dissolve to these polygons, but not those ones".

A more flexible approach would be a filter function:

var dissolved = turf.dissolve(features, { filter: f => f.properties.id === 47 } );

This way you're less likely to have to pre-massage the polygons to get the dissolve you want.

[stevage]

Oh, actually I think it does do what I want, the documentation could just be clearer.

Replace:

features with equals 'propertyName' in

with

features with the same propertyName value will be dissolved.