Distributions: adapt Exponential, add InvCDF
Distributions: Erlang & Gamma: static WithXY with optional random source argument
Distributions: adapt FisherSnedecor
Distributions: adapt Gamma
Distributions: adapt InverseGamma
Distributions: adapt Laplace
Distributions: adapt Pareto, add InvCDF
Distributions: adapt Rayleigh, add InvCDF