Upgrade cocoa to 0.25 and core-graphics to 0.23 (#10)

Author: FlannyH

Cargo.toml

@@ -17,8 +17,8 @@ raw-window-handle = "0.6.0"
 objc = "0.2"
 
 [target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
-cocoa = "0.24"
-core-graphics = "0.22"
+cocoa = "0.25"
+core-graphics = "0.23"
 
 [package.metadata.docs.rs]
 targets = [