CompatHelper: add new compat entry for Statistics at version 1 for package docs, (keep existing compat) (#536)

Co-authored-by: CompatHelper Julia <[email protected]>

Author: github-actions[bot]

docs/Project.toml

@@ -12,4 +12,5 @@ Documenter = "0.27"
 KernelFunctions = "0.10"
 Kronecker = "0.4, 0.5"
 PDMats = "0.11"
+Statistics = "1"
 julia = "1.3"