Add missing properties / methods
Add missing properties / methods

https://github.com/cure53/DOMPurify/issues/305
magny/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,magny/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped