Feature request: set custom edge's border length

[khudolia]

I want make them longer, then default length(on first image), expected result - second image. Whould be cool have some property, for example, double borderLength, and by changing it will changing length of corners. Anyway, package is really cool, thanks.

[lekanbar]

Hey @khudolia, sorry just really seeing this after 2 years lol. But it sounds like a good idea, unfortunately my day job does not give me the chance to make this improvement right now, but if can you come up with the PR I can check it out and get it in asap.