reval: repeated function evaluation for sensitivity analysis

reval is a small utility package for repeated function evaluations in R. It is designed to simplify scenario testing and sensitivity analysis. The package supports one-factor-at-a-time (OFAT) sensitivity analysis, evaluation of parameter sets and (sampled) parameter permutation. The actual evaluation is done using furrr::future_pmap() to take advantage of parallel processing functionality as specified via future::plan().