require DiffTests 0.1.3

To test the autodiff of `f(x)=M*x` or `f(x)=M\x`

Author: alyst

Project.toml

@@ -26,7 +26,7 @@ Calculus = "0.5"
 CommonSubexpressions = "0.3"
 DiffResults = "1.1"
 DiffRules = "1.4"
-DiffTests = "0.1"
+DiffTests = "0.1.3"
 LogExpFunctions = "0.3"
 NaNMath = "1"
 Preferences = "1"