Add Howler 2.1.1 definitions (#33438)
Add Howler 2.1.1 definitions (#33438)

* Add Howler 2.1.1 definitions

* fix unlock event name

markogresak/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,borisyankov/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped