Add ConstantSourceNode compat data (#501)
Add ConstantSourceNode compat data (#501)

* adding ConstantSourceNode

* setting opera and chrome entries to false, as ConstantSourceNode doesnt appear to exist in the Chromium code repo

* fixing more asks from jyp

* fixing incorrect version added values

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