Increase timeout to reduce flakes

Author: paulb777

FirebaseDynamicLinks/Tests/Unit/FIRDynamicLinksTest.m

@@ -48,7 +48,7 @@
     @"https://sample.page.link?link=%@&isi=585027354";
 static NSString *const kURLScheme = @"gindeeplinkurl";
 
-static const NSTimeInterval kAsyncTestTimout = 0.5;
+static const NSTimeInterval kAsyncTestTimout = 1.0;
 
 /**
  * This string was generated by percent-encoding the Tactile URL for the Tokyo American Club in