Enable insecure connections to http URLs for the POST requests

This allows us to connect to local http URLs for testing

src/ios/BEMCommunicationHelper.m

@@ -201,6 +201,7 @@ - (void)postToHost {
         myFetcher.allowLocalhostRequest = YES;
         myFetcher.retryEnabled = YES;
         myFetcher.bodyData = jsonData;
+        myFetcher.allowedInsecureSchemes = @[ @"http" ];
         [myFetcher beginFetchWithCompletionHandler:^(NSData * _Nullable data, NSError * _Nullable error) {
             self.mCompletionHandler(data, myFetcher.response, error);
         }];