Hi, can we reduce the thickness of the half pie chart? See the samples below. Current: <img width="249" alt="screen shot 2018-11-16 at 1 11 21 pm" src="https://user-images.githubusercontent.com/13663542/48606307-23893080-e9a1-11e8-8114-4e0485c48817.png"> Required: <img width="312" alt="screen shot 2018-11-16 at 1 11 11 pm" src="https://user-images.githubusercontent.com/13663542/48606308-2421c700-e9a1-11e8-9f11-b2aa082ad914.png">