Implemented possibility to mute/unmute the videos

[koo27]

I needed to start the videos without sound, but needed to handle that by user hand.
So I implemented the possibility to add the property muted to the story object as a boolean value. If true, the video will start muted, otherwise you'll be able to hear the sound.
Please remember that you must specify the type="video" property in the story.

I also added two new props to the Stories object: mutedComponent and unmutedComponent in order to customize the button/text to mute/unmute the videos.

An easy example could be

mutedComponent={<h2 style={{ color: "white", fontSize: 22}}>UNMUTE</h2>}
unmutedComponent={<h2 style={{ color: "white", fontSize: 22}}>MUTE</h2>}

Of course you could use an Icon or whatever you prefer.

I tried to follow your code style, and hope everything is fine.
My side it seems to work great.

[imdewan]

can you give an example of how to use muted or how to trigger mute