fix Project.toml

Author: mohamed82008

Project.toml

@@ -20,12 +20,14 @@ ZygoteRules = "700de1a5-db45-46bc-99cf-38207098b444"
 
 [compat]
 Combinatorics = "0.7"
-Distributions = "0.22"
 DiffRules = "0.1, 1.0"
+Distributions = "0.22"
 FillArrays = "0.8"
+FiniteDifferences = "0.9"
 ForwardDiff = "0.10.6"
 PDMats = "0.9"
 SpecialFunctions = "0.8, 0.9, 0.10"
+StatsBase = "0.32"
 StatsFuns = "0.8, 0.9"
 Tracker = "0.2.5"
 Zygote = "0.4.7"