Fix: Sounds stop playing after context is interrupted (fixes #928)

[alvov]

In Safari browser on iOS when browser tab loses focus the audio context gets interrupted. If during this inactivity the "_autoSuspend" timeout fires, Howler is set to the suspending state, but the self.ctx.suspend() promise gets rejected, so Howler is never switched to the suspended state (which would allow the _autoResume method to perform).

Steps to reproduce:

1. grab iPhone with iOS 11 or 12
2. start an application that uses Howler (autoSuspend property should be set to true)
3. play a sound up to the end, which should trigger the auto suspension timer
4. then switch from the browser to the home screen (or another app)
5. wait for 30 seconds until the suspension timer fires, then switch back to the browser
6. Howler is stuck in suspending state

[alvov]

@goldfire can you please take a look? it's a relatively small one 🙃

[alvov]

@goldfire I've added interrupted state handling as was discussed here #928 (comment)
please check this PR

[mmoss]

@goldfire any chance of getting this in?

[kurozael]

@goldfire is this being ignored? Because this is an issue for us in prod.

[kant2002]

@goldfire @kurozael any information when this will be merged in?

[abdurrahmancuce]

@goldfire why is this PR not merged? This is an issue for us in prod.

[kant2002]

@abdurrahmancuce you can use @kant2002/howler package which I have to publish to start using code from this PR.

[goldfire]

Sorry, I must have missed this one! Thanks for finding the solution to this. I've gotten it tested now and will have it released later today in 2.2.0.

[alvov]

@goldfire thank you very much!