Move tap gesture from cell to collectionView

[zhongwuzw]

Reduce tap gesture amount by move tap gesture from cell to collectionView.

[SD10]

@zhongwuzw Can you explain this a little more to me? It feels awkward moving this into MessagesCollectionView

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[nathantannar4]

Would it help performance? Having one tap gesture rather than X. I know you can very easily translate a tap to a point and this get the cell that was tapped

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[zhongwuzw]

@SD10 @nathantannar4 , two reasons for changes.

1. As @nathantannar4 says, it's for performance, we don't need to create tap gesture for each cell.
2. At the moment, we only need tap gesture on messageContainerView of cell, maybe we need tap handler on headerView、FooterView..... in the future，we must add more and more tap gesture. But by translate the tap gesture to collectionView, we can easily do it.

[SD10]

@zhongwuzw Can you add a CHANGELOG entry?

Changed

• Breaking Change Moved the handleTapGesture(_ gesture: UIGestureRecognizer) method from MessagesCollectionViewCell to MessagesCollectionView.