Add compat entry for Enzyme

Author: utkarsh530

Project.toml

@@ -22,4 +22,4 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 
 [compat]
 KernelAbstractions = "<0.9.30"
-julia = "1.6"
+Enzyme = "<0.13.35"

test/runtests.jl

@@ -1,14 +1,15 @@
 using SafeTestsets
 using Test
 
-const GROUP = get(ENV, "GROUP", "CPU")
+global CI_GROUP = get(ENV, "GROUP", "CPU")
 
 @safetestset "Regression tests" include("./regression.jl")
 @safetestset "Reinitialization tests" include("./reinit.jl")
 
 #TODO: Curent throws warning for redefinition with the use of @testset multiple times. Migrate to TestItemRunners.jl
-@testset for GROUP in unique(("CPU", GROUP))
-    @testset "$(GROUP) optimizers tests" include("./gpu.jl")
-    @testset "$(GROUP) optimizers with constraints tests" include("./constraints.jl")
-    @testset "$(GROUP) hybrid optimizers" include("./lbfgs.jl")
+@testset for  BACKEND in unique(("CPU", CI_GROUP))
+    global GROUP = BACKEND
+    @testset "$(BACKEND) optimizers tests" include("./gpu.jl")
+    @testset "$(BACKEND) optimizers with constraints tests" include("./constraints.jl")
+    @testset "$(BACKEND) hybrid optimizers" include("./lbfgs.jl")
 end

test/utils.jl

@@ -1,5 +1,4 @@
-const GROUP = get(ENV, "GROUP", "CPU")
-const backend = if GROUP == "CUDA"
+global backend = if GROUP == "CUDA"
     using CUDA
     CUDA.CUDABackend()
 elseif GROUP == "AMDGPU"