Asynchronous JavaScript using awaitify (github.com)

awaitify has a small set of functionality, but it could be really useful, if you want to write clean and readable async code without using any transpilers. Using Awaitify, Function Generators along with `yield` keyword works exactly like async/await function. It also allows to convert old fashioned callback based functions into promise based functions with writing only one line of code. Any feedback would be greatly appreciated.