Service worker support

[calebmer]

As Vulture aims to be a light abstraction over rendering JSX, we should be able to easily support rendering inside a service worker. All that should be required is being able to serialize patches into JSON (this means no function attributes…), and creating an event system that can post events back into the worker.

However, if there are no service workers available, the abstraction must be light enough to work in their absence.

This is an interesting space to explore.