A mlr3::TaskGenerator calling simsurv::simsurv() from package simsurv.
This generator currently only exposes a small subset of the flexibility of simsurv,
and just creates a small data set with the following numerical covariates:
treatment: Bernoulli distributed with log hazard ratio -0.5.
height: Normally distributed with log hazard ratio 1.
weight: normally distributed with log hazard ratio 0.
See simsurv::simsurv() for an explanation of the hyperparameters.