add support for `mutedAutoplay: false`when updating player to 7.2.4

[bbbo]

add support for mutedAutoplay: falsewhen updating player to 7.2.4
The 7.2.x player by default attempt muted autoplay if autoplay with sound is not allowed by a browser (current Safari, newer Chrome). To turn this off, one should be able to set the option to false.

[bbbo]

@underdude we really need this ;)

[bbbo]

@underdude ping ;)
it seems the player often starts muted for people (sometimes even if autoplay with sounds is allowed...