Echo JS 0.11.0

I've effectively stopped supporting IE11 for over 2 years now... Every other browser added async function support by the end of April, 2017, nearly 3 years ago.  That's where I cutoff.

IE11 shouldn't be supported at this point imho, and I will not make efforts to do so.  Supporting IE11 adds complexity and/or bundle sizes that are excessive to support what aren't even that modern of features at this point.

https://gist.github.com/tracker1/8eea53ec700a0fea725123516a30a70a