feat: increase should start load timeout (#47)

Author: diegomura

apple/RNCWebViewManager.m

@@ -253,9 +253,9 @@ - (BOOL)          webView:(RNCWebView *)webView
   _shouldStartLoad = YES;
   request[@"lockIdentifier"] = @(_shouldStartLoadLock.condition);
   callback(request);
-  
-  // Block the main thread for a maximum of 250ms until the JS thread returns
-  if ([_shouldStartLoadLock lockWhenCondition:0 beforeDate:[NSDate dateWithTimeIntervalSinceNow:.25]]) {
+
+  // Block the main thread for a maximum of 500ms until the JS thread returns
+  if ([_shouldStartLoadLock lockWhenCondition:0 beforeDate:[NSDate dateWithTimeIntervalSinceNow:.50]]) {
     BOOL returnValue = _shouldStartLoad;
     [_shouldStartLoadLock unlock];
     _shouldStartLoadLock = nil;