Is your feature request related to a problem? Please describe.
The Dunn-Šidák correction is a less stringent multiple testing correction than Bonferroni's. Atm., it is missing in FSharp.Stats.

Describe the solution you'd like
Implement it.

Describe alternatives you've considered
Stick with Bonferroni & Co.

Additional context
https://personal.utdallas.edu/~herve/Abdi-Bonferroni2007-pretty.pdf
https://en.wikipedia.org/wiki/%C5%A0id%C3%A1k_correction