• ADDED New xhr property that allows setting custom headers (such as for auth), changing the withCredentials setting and specifying the HTTP method for the request. These only apply to Web Audio (#997).
• ADDED New Howler.stop() global stop method to stop all sounds at once (#1308).
• ADDED Support for m4b audio format (#1170).
• CHANGED Allow passing metadata string to preload option to only preload the metadata (#1140).
• FIXED Correctly handle AudioContext interrupted state causing stuck suspending state (#1106).
• FIXED The volume method would sometimes return incorrect values when using very short fade lengths (#1045).
• FIXED Error that HowlerGlobal was not defined when using jsdom-global (#1331).
• FIXED Memory leak in Safari when an audio context can't be unlocked (#1338).

Breaking Changes

• The xhrWithCredentials property is now included in the xhr property object with key withCredentials.