UnfoldStats v0.2.2

Diff since v0.2.1

• maintenance update. Tests are now compatible with UnfoldSim 0.5, compatability of BSplineKit increased to 0.19

Merged pull requests:

• Add sidefun to permutation function parameters (#19) (@behinger)
• docs: add behinger as a contributor for code, bug, and 2 more (#21) (@allcontributors[bot])
• docs: add rosagross as a contributor for bug (#22) (@allcontributors[bot])
• Update BSpline and Julia compat (#23) (@ReneSkukies)