fix(ios) Fixes RCTBridge not being released when JitsiMeet is trying to destroy its bridge on some OS versions

ios/sdk/src/JitsiMeet.m

@@ -127,6 +127,7 @@
 }
 
 - (void)destroyReactNativeBridge {
+    [_bridgeWrapper invalidate];
     _bridgeWrapper = nil;
 }
 

ios/sdk/src/RCTBridgeWrapper.h

@@ -34,4 +34,6 @@
 
 @property (nonatomic, readonly, strong)  RCTBridge *bridge;
 
+- (void)invalidate;
+
 @end

ios/sdk/src/RCTBridgeWrapper.m

@@ -33,6 +33,10 @@
     return self;
 }
 
+- (void)invalidate {
+    [_bridge invalidate];
+}
+
 #pragma mark helper methods for getting the packager URL
 
 #if DEBUG