CoreBluetooth iOS xcode13.0 beta1

#CoreBluetooth.framework https://github.com/xamarin/xamarin-macios/pull/12153

diff -ruN /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManager.h /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManager.h
--- /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManager.h	2021-03-16 05:18:22.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManager.h	2021-06-02 11:07:09.000000000 -0400
@@ -64,8 +64,8 @@
  *
  */
 typedef NS_OPTIONS(NSUInteger, CBCentralManagerFeature) {
-	CBCentralManagerFeatureExtendedScanAndConnect = 1UL << 0,
-} NS_ENUM_AVAILABLE_IOS(13_0) NS_SWIFT_NAME(CBCentralManager.Feature);
+	CBCentralManagerFeatureExtendedScanAndConnect CB_CM_API_AVAILABLE = 1UL << 0,
+} NS_SWIFT_NAME(CBCentralManager.Feature);
 
 @protocol CBCentralManagerDelegate;
 @class CBUUID, CBPeripheral;
@@ -103,7 +103,7 @@
  *  @discussion     Returns a boolean value representing the support for the provided features.
  *
  */
-+ (BOOL)supportsFeatures:(CBCentralManagerFeature)features NS_AVAILABLE_IOS(13_0) NS_SWIFT_NAME(supports(_:));
++ (BOOL)supportsFeatures:(CBCentralManagerFeature)features CB_CM_API_AVAILABLE NS_SWIFT_NAME(supports(_:));
 
 - (instancetype)init;
 
@@ -236,8 +236,7 @@
  *  @seealso        	CBConnectionEventMatchingOptionServiceUUIDs
  *  @seealso            CBConnectionEventMatchingOptionPeripheralUUIDs
  */
-- (void)registerForConnectionEventsWithOptions:(nullable NSDictionary<CBConnectionEventMatchingOption, id> *)options NS_AVAILABLE_IOS(13_0);
-
+- (void)registerForConnectionEventsWithOptions:(nullable NSDictionary<CBConnectionEventMatchingOption, id> *)options CB_CM_API_AVAILABLE;
 
 @end
 
@@ -355,7 +354,7 @@
  *  @discussion         This method is invoked upon the connection or disconnection of a peripheral that matches any of the options provided in {@link registerForConnectionEventsWithOptions:}.
  *
  */
-- (void)centralManager:(CBCentralManager *)central connectionEventDidOccur:(CBConnectionEvent)event forPeripheral:(CBPeripheral *)peripheral NS_AVAILABLE_IOS(13_0);
+- (void)centralManager:(CBCentralManager *)central connectionEventDidOccur:(CBConnectionEvent)event forPeripheral:(CBPeripheral *)peripheral CB_CM_API_AVAILABLE;
 
 /*!
  *  @method centralManager:didUpdateANCSAuthorizationForPeripheral:
diff -ruN /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManagerConstants.h /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManagerConstants.h
--- /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManagerConstants.h	2021-03-16 05:18:22.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManagerConstants.h	2021-06-02 05:37:55.000000000 -0400
@@ -10,6 +10,8 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+#define CB_CM_API_AVAILABLE		API_AVAILABLE( ios( 13.0 ), tvos( 13.0 ), watchos( 6.0 ) ) API_UNAVAILABLE(macos)
+
 /*!
  *  @const  CBCentralManagerOptionShowPowerAlertKey
  *
@@ -180,7 +182,7 @@
  *	@seealso	registerForConnectionEventsWithOptions:
  *
  */
-CB_EXTERN CBConnectionEventMatchingOption const CBConnectionEventMatchingOptionServiceUUIDs NS_AVAILABLE_IOS(13_0);
+CB_EXTERN CBConnectionEventMatchingOption const CBConnectionEventMatchingOptionServiceUUIDs CB_CM_API_AVAILABLE;
 
 /*!
  *  @const  CBConnectionEventMatchingOptionPeripheralUUIDs
@@ -192,6 +194,6 @@
  *	@seealso	registerForConnectionEventsWithOptions:
  *
  */
-CB_EXTERN CBConnectionEventMatchingOption const CBConnectionEventMatchingOptionPeripheralUUIDs NS_AVAILABLE_IOS(13_0);
+CB_EXTERN CBConnectionEventMatchingOption const CBConnectionEventMatchingOptionPeripheralUUIDs CB_CM_API_AVAILABLE;
 
 NS_ASSUME_NONNULL_END
diff -ruN /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCharacteristic.h /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCharacteristic.h
--- /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCharacteristic.h	2021-03-16 05:20:10.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCharacteristic.h	2021-06-02 05:35:22.000000000 -0400
@@ -63,7 +63,7 @@
  *      A back-pointer to the service this characteristic belongs to.
  *
  */
-@property(assign, readonly, nonatomic) CBService *service;
+@property(weak, readonly, nonatomic) CBService *service;
 
 /*!
  * @property properties
diff -ruN /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBDescriptor.h /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBDescriptor.h
--- /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBDescriptor.h	2021-03-16 08:47:33.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBDescriptor.h	2021-06-02 12:47:08.000000000 -0400
@@ -30,7 +30,7 @@
  *      A back-pointer to the characteristic this descriptor belongs to.
  *
  */
-@property(assign, readonly, nonatomic) CBCharacteristic *characteristic;
+@property(weak, readonly, nonatomic) CBCharacteristic *characteristic;
 
 /*!
  *  @property value
diff -ruN /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBPeripheralManagerConstants.h /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBPeripheralManagerConstants.h
--- /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBPeripheralManagerConstants.h	2021-03-16 08:47:33.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBPeripheralManagerConstants.h	2021-06-02 12:47:08.000000000 -0400
@@ -10,6 +10,8 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+#define CB_PM_API_AVAILABLE        API_AVAILABLE( ios( 13.0 ), tvos( 13.0 ), watchos( 6.0 ) ) API_UNAVAILABLE(macos)
+
 /*!
  *  @const  CBPeripheralManagerOptionShowPowerAlertKey
  *
diff -ruN /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBService.h /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBService.h
--- /Applications/Xcode_12.5.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBService.h	2021-03-16 08:47:33.000000000 -0400
+++ /Applications/Xcode_13.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBService.h	2021-06-02 12:47:08.000000000 -0400
@@ -33,7 +33,7 @@
  *      A back-pointer to the peripheral this service belongs to.
  *
  */
-@property(assign, readonly, nonatomic) CBPeripheral *peripheral;
+@property(weak, readonly, nonatomic) CBPeripheral *peripheral;
 
 /*!
  * @property isPrimary