Add DIT to test deps of DI

Author: gdalle

DifferentiationInterface/Project.toml

@@ -67,6 +67,7 @@ julia = "1.10"
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+DifferentiationInterfaceTest = "a82114a7-5aa3-49a8-9643-716bb13727a3"
 Diffractor = "9f5e2b26-1114-432f-b630-d3fe2085c51c"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 Enzyme = "7da242da-08ed-463a-9acd-ee780be4f1d9"
@@ -92,6 +93,7 @@ test = [
     "ADTypes",
     "Aqua",
     "DataFrames",
+    "DifferentiationInterfaceTest",
     "Diffractor",
     "Documenter",
     "Enzyme",