Delay parameter for tap() method

[andriiShutov]

Use case

Sometimes Patrol is too fast. It would be great to have a config setting for a static delay before the tap() action. There 2 reasons for this:

1. Sometimes the application does not respond to very fast actions and the tap method is ignored
2. While watching the execution of the test, I do not have time to understand what exactly is happening during its execution

Proposal

PatrolTesterConfig would be great for new parameter

const PatrolTesterConfig({
this.existsTimeout = const Duration(seconds: 10),
this.visibleTimeout = const Duration(seconds: 10),
this.settleTimeout = const Duration(seconds: 10),
this.settlePolicy = SettlePolicy.trySettle,
this.dragDuration = const Duration(milliseconds: 100),
this.settleBetweenScrollsTimeout = const Duration(seconds: 5),
this.tapTimeout = const Duration(milliseconds: 0),
});