Interesting. That doesn't seem like a complete clear cut case of it though, more the git-fu of the repo maintainer there might not be all that great. :(

Saying that from looking at your PR:

https://github.com/duosecurity/duo_universal_php/pull/7

Then looking at the commit which eventually got into their repo:

https://github.com/duosecurity/duo_universal_php/commit/c69e...

Even though they fucked up the author name on the commit itself, they at least attempted to credit you in the commit title:

    Merge PR 7 from theodorejb; Add missing type declarations and fix incorrect PHPDoc types

While that's not fantastic as it screws up proper attribution with pretty much every automated git tool... it doesn't seem like a case of them trying to claim credit for someone else's work.

That's just my impression anyway. Could be wrong. :D