Summary

This PR attempts to provide the functionality required on issue#424here

The approach was to delegate on the original table view delegate's implementation of theheightForXXX andestimatedHeightForXXX family of methods.
The main issue faced is that given that those methods areoptionals on the Objc protocol, then the return types aren't optional.

I was about to returnUITableView.automaticDimension, which works similarly, but readingthis piece of doc, it states that the value returned byheightForRow takes precedence over the propertyrowHeight. Following that logic, and to avoid breaking any current implementations, i delegated on the tableView'sXXXheight andestimatedXXXHeight and properties, which i'm assuming (and please correct me if i'm wrong) are either properly set by users to the expected height orautomaticDimension

Videos

Steps to reproduce

Added on the iOS example:
ViewController > SkeletonTableViewDelegate

    func collectionSkeletonView(_ skeletonView: UITableView, numberOfRowsInSection section: Int) -> Int {        return 10    }    func numSections(in collectionSkeletonView: UITableView) -> Int {        return 2    }    func numberOfSections(in tableView: UITableView) -> Int {        return 2    }

And to test the different heights you can use any set of hardcoded values, includingautomaticDimension

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {        if (indexPath.section == 0) {            return UITableView.automaticDimension        } else {            return 250        }    }    func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {        if (section == 0) {            return 10        } else {            return 50        }    }    func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {        if (section == 0) {            return 10        } else {            return 50        }    }

Requirements (place anx in each of the[ ])

• I've read and understood theContributing guidelines and have done my best effort to follow them.
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