test: add Nemo to extension deps

Author: AayushSabharwal

test/extensions/Project.toml

@@ -6,6 +6,7 @@ ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
 HomotopyContinuation = "f213a82b-91d6-5c5d-acf7-10f1c761b327"
 LabelledArrays = "2ee39098-c373-598a-b85f-a56591580800"
 ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
+Nemo = "2edaba10-b0f1-5616-af89-8c11ac63239a"
 OrdinaryDiffEq = "1dea7af3-3e70-54e6-95c3-0bf5283fa5ed"
 SciMLSensitivity = "1ed8b502-d754-442c-8d5d-10ac956f44a1"
 SciMLStructures = "53ae85a6-f571-4167-b2af-e1d143709226"