Last update to mark a problem as solved was in December last year: https://github.com/edemaine/topp/pull/10
You just need to file a simple PR to mark a problem as solved though. I cannot get much simplier
Thanks for the pointer, I just saw the 2nd edition of Discrete and Computational Geometry will be coming out in July:
https://www.amazon.com/-/en/Discrete-Computational-Geometry-...
(I preordered a copy)
Definitely out of date, e.g. the 3SUM subquadratic conjecture (probably 11) has been solved and improved on [1].
If it's not been already there's immediate application, e.g. problem 41.
[1]:https://link.springer.com/article/10.1007/s00453-015-0079-6
All three authors are large contributors to the field (the book _discrete and computational geometry_ by O'Rourke & Devadoss is excellent), Demaine has some origami in the collection at MoMA NYC^, Mitchell found a ptas for euclidian tsp (Google it - the paper is readable and there is another good write up of his vs Arora's)
^ https://erikdemaine.org/curved/MoMA/