feat(citation): cff (#1)

[sambacha]

Had to generate this for a citation in a paper, so thought I would formalize it

Thanks!

[angeris]

Thanks! Sorry I missed this for a while. The paper has been accepted to EC'22 with the following ACM citation, if you'd like to update the citation file (and I can merge after!):

Guillermo Angeris, Alex Evans, Tarun Chitra, and Stephen Boyd. 2022. Optimal Routing for Constant Function Market Makers. In Proceedings of the 23rd ACM Conference on Economics and Computation (EC ’22), July 11–15, 2022, Boulder, CO, USA. ACM, New York, NY, USA, 14 pages. https://doi.org/10.1145/3490486.3538336

Thanks!

[dzmitry-lahoda]

@sambacha would update one or issue to be closed? thank you a lot.