Make Base.exponent non_differentiable (#820)

* add Base.exponent to non_differentiable

* version 1.72.4

---------

Co-authored-by: Michael Abbott <[email protected]>

Author: jClugstor

Project.toml

@@ -1,6 +1,6 @@
 name = "ChainRules"
 uuid = "082447d4-558c-5d27-93f4-14fc19e9eca2"
-version = "1.72.3"
+version = "1.72.4"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"

src/rulesets/Base/nondiff.jl

@@ -159,6 +159,7 @@
 @non_differentiable evalfile(::AbstractString)
 @non_differentiable evalfile(::AbstractString, ::Array{String,1})
 @non_differentiable expanduser(::AbstractString)
+@non_differentiable exponent(::Any)
 
 @non_differentiable fd(::Base.Filesystem.File)
 @non_differentiable fd(::IOStream)