Add 175 single objective unconstrained test problems?

[kvdblom]

https://arxiv.org/pdf/1308.4008

Momin Jamil and Xin-She Yang, A literature survey of benchmark functions for
global optimization problems, Int. Journal of Mathematical Modelling and
Numerical Optimisation, Vol. 4, No. 2, pp. 150–194 (2013).
DOI: 10.1504/IJMMNO.2013.055204

(at least) 72 are in smoof
https://files01.core.ac.uk/download/636660890.pdf

Bossek, "smoof: Single- and Multi-Objective Optimization Test Functions", The R Journal, 2017