Add compat data for SVG <mask> (#1434)
Add compat data for SVG <mask> (#1434)

* Add compat data for SVG <mask>

* Fix review comments

mdn/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,teoli2003/browser-compat-data