ios: Update to objc2 v0.6

Author: madsmtm

Cargo.toml

@@ -36,9 +36,9 @@ jni = "0.21"
 ndk-context = "0.1"
 
 [target.'cfg(any(target_os = "ios", target_os = "tvos", target_os = "visionos"))'.dependencies]
-block2 = "0.5.0"
-objc2 = "0.5.1"
-objc2-foundation = { version = "0.2.0", default-features = false, features = [
+block2 = "0.6.0"
+objc2 = "0.6.0"
+objc2-foundation = { version = "0.3.0", default-features = false, features = [
     "std",
     "NSDictionary",
     "NSString",

src/ios.rs

@@ -1,12 +1,12 @@
 use crate::{Browser, BrowserOptions, Error, ErrorKind, Result, TargetType};
 use block2::Block;
-use objc2::rc::Id;
+use objc2::rc::Retained;
 use objc2::runtime::Bool;
-use objc2::{class, msg_send, msg_send_id};
+use objc2::{class, msg_send};
 use objc2_foundation::{NSDictionary, NSObject, NSString, NSURL};
 
-fn app() -> Option<Id<NSObject>> {
-    unsafe { msg_send_id![class!(UIApplication), sharedApplication] }
+fn app() -> Option<Retained<NSObject>> {
+    unsafe { msg_send![class!(UIApplication), sharedApplication] }
 }
 
 fn open_url(