Mark touch-action supported by the next version of Safari (#4287)
Mark touch-action supported by the next version of Safari (#4287)

* Mark touch-action (L1 values and pinch-zoom) supported by the next version of Safari
* Split touch-action level 1 values into separate subfeatures
* Mark touch-action pan-up, pan-down, pan-left and pan-right as experimental
* Remove all instances of edge_mobile from css touch-action

chrisdavidmills/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data