add back ZygoteRules

Author: ChrisRackauckas

Project.toml

@@ -12,6 +12,7 @@ RecipesBase = "3cdcf5f2-1ef4-517c-9805-6587b60abb01"
 Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
+ZygoteRules = "700de1a5-db45-46bc-99cf-38207098b444"
 
 [compat]
 ArrayInterface = "2.7, 3.0"
@@ -20,6 +21,7 @@ DocStringExtensions = "0.8"
 RecipesBase = "0.7, 0.8, 1.0"
 Requires = "0.5, 1.0"
 StaticArrays = "0.12, 1.0"
+ZygoteRules = "0.2"
 julia = "1.6"
 
 [extras]

src/RecursiveArrayTools.jl

@@ -10,6 +10,7 @@ using DocStringExtensions
 
   import ChainRulesCore
   import ChainRulesCore: NoTangent
+  import ZygoteRules
   abstract type AbstractVectorOfArray{T, N, A} <: AbstractArray{T, N} end
   abstract type AbstractDiffEqArray{T, N, A} <: AbstractVectorOfArray{T, N, A} end