Zh OpenStreetMap, new options for paths

Hi.

Added 4 parameters for path
lineCap
lineJoin
dashArray
dashOffset

Read about this parameters in leaflet docs https://leafletjs.com/reference-1.6.0.html#path-linecap

For dashArray you can enter numbers separated by space
For example: 20 10 20
or: 20 20

In leaflet docs (in my just a little later) there are links to mozilla docs