When audio is false there is not audio in the MediaStream from the Webcam

[markVaykhansky]

Please follow the general troubleshooting steps first:

• Is your app running over HTTPS? No
• Have you tried running the demo (https://codepen.io/mozmorris/pen/JLZdoP) on your device? Yes
• Checked the latest "Can I use" compatbility table? (https://caniuse.com/stream) Yes

Bug reports:

Not sure if this is intended or not.

Use case: We want a webcam with an audio stream to record but it shouldn't playback the audio.

When I set audio prop to false in order to mute the Webcam it also disables the audio stream of the WebCam's MediaStream.
There should not be coupling between the two.

I belive that removing the if statement on line 278 in react-webcam.tsx should do the trick.

[mozmorris]

<Webcam muted={true} audio /> should do the trick.