[requires.io] dependency update

requires · requires · commit 1101c18d6768 · 2018-06-05T14:31:08.000+01:00
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
-pytest==3.6.0
+pytest==3.6.1
 pytest-cov==2.5.1
 pytest-xdist==1.22.2
 hypothesis
