Update README.md (#59)

Author: ay42

README.md

@@ -78,11 +78,8 @@ RangeSlider(range: $model.range2, distance: 0.1 ... 1.0)
 - macOS 10.15+
 - Xcode 11.0+
 
-## Roadmap
-- Circular sliders and tracks
-
 ## Code Contributions
 Feel free to contribute via fork/pull request to master branch. If you want to request a feature or report a bug please start a new issue.
 
-## Coffee Contributions
+## Become a Sponsor
 If you find this project useful please consider becoming our GitHub sponsor.