binary-search: Add test version string (exercism#1024)

CSJedi · Nathan Parsons · commit 636909be892b · 2017-10-27T15:53:25.000+01:00
* Add test version string (tests already up-to-date)
diff --git a/exercises/binary-search/binary_search_test.py b/exercises/binary-search/binary_search_test.py
@@ -3,6 +3,8 @@
 from binary_search import binary_search
 
 
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.0.0
+
 class BinarySearchTests(unittest.TestCase):
     def test_finds_value_in_array_with_one_element(self):
         self.assertEqual(binary_search([6], 6), 0)
