[requires.io] dependency update

requires · requires · commit ad8840f75668 · 2018-06-05T14:32:04.000+01:00
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,3 +1,3 @@
-pytest==3.6.0
+pytest==3.6.1
 pytest-cov==2.5.1
 hypothesis
