Fix 1.6 compat

Author: pxl-th

Project.toml

@@ -52,10 +52,13 @@ SuiteSparse = "1"
 julia = "1.6"
 
 [extras]
+Atomix = "a9b6321e-bd34-4604-b9c9-b65b8de01458"
 ChainRulesTestUtils = "cdddcdb0-9152-4a09-a978-84456f9df70a"
+GPUArrays = "0c68f7d7-f131-5f86-a1c3-88cf8149b2d7"
 FiniteDifferences = "26cc04aa-876d-5657-8c51-4c34ba976000"
 JLArrays = "27aeb0d3-9eb9-45fb-866b-73c2ecf80fcb"
 JuliaInterpreter = "aa1ae85d-cabe-5617-a682-6adf51b2e16a"
+KernelAbstractions = "63c18a36-062a-441e-b654-da1e3ab1ce7c"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"