For use with legacy implelemtations, it is important that both $asyncbind and $asyncspawn can be stringified and have no dependencies.

To do so, we require the contents of their dependencies and inline them.

This reduces runtime size slightly (due to the removal of processIncludes()) and no longer uses new Function(), making it compatible with a strict Content-Security-Policy.

'npm install' builds a dist/index.js that contains this implementation.