If this version belongs to OutCast3k why then they do not delete or update this version?
I looked at /JS/ there is not even a standard RFC 6979 (
https://tools.ietf.org/html/rfc6979)
My conclusion came based on two things:
1. The current repository has version 1.1 as the first release which means that 1.0 might have been somewhere else (in the link you gave).
2. Whoever posted that release wanted to give credit to OutCast3k. I don't this is likely because coinb.in was not famous back then, so someone hosting something for phishing people is unlikely.
Either way though, I wouldn't suggest using it even If it was from the original creator, because it might contain a lot of bugs.