pin to >=0.20.0 of FlyingFox

Author: lhoward

Package.swift

@@ -49,7 +49,7 @@ PlatformProducts = []
 PlatformTargets = []
 #elseif os(macOS) || os(iOS)
 PlatformPackageDependencies = [
-  .package(url: "https://github.com/swhitty/FlyingFox", branch: "main"),
+  .package(url: "https://github.com/swhitty/FlyingFox", from: "0.20.0"),
   .package(
     url: "https://github.com/spacenation/swiftui-sliders.git",
     from: "2.1.0"