Notes

/// Attaches `gesture` to `self` such that it has higher precedence
/// than gestures defined by `self`.
.highPriorityGesture(gesture: Gesture)

/// Attaches `gesture` to self such that it will be processed
/// simultaneously with gestures defined by `self`.
.simultaneousGesture(gesture: Gesture)

/// Returns a new gesture that will sequence `self` and `other`,
/// such that `other` does not receive any events until `self` has
/// succeeded.
Gesture().sequenced(before: Gesture)