Update README / Shared component with Bit

[JoshK2]

I've shared react-Lottie as a Bit component so that people can

a) Discover it when searching for components in Bit b) Play with it Bit's live playground c) Install it with NPM/Yarn d) Import it into their own projects and develop it

I'd be happy to continue and update the component, or if you prefer I'd love to hand over ownership (or both:).