Update Readme to include iOS and macOS support.

Author: simonboots

README.md

@@ -11,4 +11,6 @@ The number of functions and the type of series can be changed. The following ser
 * Triangle
 * Pulse
 
-I started this little project to familiarise myself a bit more with SwiftUI and its drawing APIs. It is not meant to be perfect SwiftUI and I am sure there are probably better ways of doing things. Any feedback is appreciated!
+It builds and runs on iOS and macOS using Catalyst.
+
+I started this little project to familiarise myself a bit more with SwiftUI and its drawing APIs. It is not meant to be perfect SwiftUI and I am sure there are probably better ways of doing things. Any feedback is appreciated!