Add Test::Requires to dependencies

diff --git a/Makefile.PL b/Makefile.PL
index 57e28f2..7f608e7 100755 (executable)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -26,6 +26,7 @@ requires 'Scalar::Util' => 1.14;
 
 test_requires 'Test::More'      => 0.88;
 test_requires 'Test::Exception' => 0.29;
+test_requires 'Test::Requires'  => 0.03;
 # test_requires 'Test::Output'    => 0.16; # too many dependencies!
 
 if($] < 5.010) {