Make PlayPauseButton size configurable

[ChopinDavid]

Is your feature request related to a problem? Please describe.
We are using the play pause button alongside CurrentPosition, ProgressBar, etc. at the bottom edge of the video player. The PlayPauseButton has a forced size of 60.0. The button looks way too large in this context.

Describe the solution you'd like
Give PlayPauseButton constructor an optional argument that specifies the button's size.

Describe alternatives you've considered
N/a

Additional context
N/a

[julianfalcionelli]

@ChopinDavid, is there a way to customize the Play/Pause button in the center? I can only customize the one placed in the bottom actions.

[ChopinDavid]

@julianfalcionelli Sorry, just now seeing your comment. I don't really maintain this project, just made this and a couple of other PRs.

That being said, it does seem that the PlayPauseButton that appears in the center of the player is hardcoded into the YoutubePlayer widget, that is, you cannot customize this button. It may make sense to make a change/PR to add an optional and configurable Widget that can be passed into YoutubePlayer in place of the hard coded PlayPauseButton?