fix up test setup

Author: ChrisRackauckas

lib/SCCNonlinearSolve/test/core_tests.jl

@@ -5,6 +5,7 @@ include("../../../common/common_rootfind_testing.jl")
 end
 
 @testitem "Manual SCC" setup=[CoreRootfindTesting] tags=[:core] begin
+    using NonlinearSolve
     function f(du, u, p)
         du[1] = cos(u[2]) - u[1]
         du[2] = sin(u[1] + u[2]) + u[2]

lib/SCCNonlinearSolve/test/qa_tests.jl

@@ -12,7 +12,7 @@
 end
 
 @testitem "Explicit Imports" tags=[:core] begin
-    using ExplicitImports, SCCNonlinearSolve
+    using ExplicitImports, SciMLBase, SCCNonlinearSolve
 
     @test check_no_implicit_imports(
         SCCNonlinearSolve; skip = (Base, Core, SciMLBase)