TypeScript type for mediaDevices missing from index.d.ts

[trevorparscal]

I added this to my own module.d.ts and it worked.

declare module 'node-web-audio-api' {
	export const mediaDevices: Navigator[ 'mediaDevices' ];
}

However, I expect mediaDevices was omitted from index.d.ts in error.

[b-ma]

Hey, thanks or the feedback, any PR is welcome on this point (and any typescript stuff), I'm not a typescript user myself so I have no ideas about what is missing (see also #40)