Update Safari support for static class variables (#8796)
Update Safari support for static class variables (#8796)

As of Safari 14, this feature is not supported on desktop or mobile.

https://github.com/mdn/browser-compat-data/issues/8468
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data