Echo JS 0.11.0

Nice, I'm glad he kept the Error serialization, though I did have two issues (pull requests made)

1) shorten to return new Date(obj); will clone the date.

2) don't return early from error object, some frameworks extend the error instance with things like exit codes, etc.

(note, I wrote the tracker1/safe-clone-deep author mentioned)

Thanks PR has been merged! I really like your reference array to test for circular values, so you deserve a mention ;).