Enhances one of my favourite podcasts

I recently noticed the JS for this on the boagworld podcast, same JS signatures, and works with a plugin I authored for media-playback-speed, so I’m very happy at the focused, long-term success of this plugin.

I’m quite interested in using data-attributes rather than an onclick handler as then I can more easily use, so if you have a repo URL I can PR to, I’d be even happier.