WebAudio v0.5.1

• Functions that previously returned null values now work with @strict and throw exceptions if enabled.
• Additionally the functions that previously hard-errored e.g. webAudio() if whitelist was disabled now throw a soft exception that you can catch with try.
• Added undocumented webAudioCanTransmit to make sure you won't error with play, pause, update etc functions. (Although you should just handle the exception instead)

Fixed #39