Support Julia 1.0

Author: gaurav-arya

src/TestUtils.jl

@@ -4,10 +4,12 @@ function test_complex_fft end
 function test_real_fft end
 
 function __init__()
-    # Better error message if users forget to load Test
-    Base.Experimental.register_error_hint(MethodError) do io, exc, _, _
-        if exc.f in (test_real_fft, test_complex_fft)
-            print(io, "\nDid you forget to load Test?")
+    if isdefined(Base, :Experimental)
+        # Better error message if users forget to load Test
+        Base.Experimental.register_error_hint(MethodError) do io, exc, _, _
+            if exc.f in (test_real_fft, test_complex_fft)
+                print(io, "\nDid you forget to load Test?")
+            end
         end
     end
 end