[requires.io] dependency update

requires · requires · commit 258095c200f5 · 2018-08-18T16:25:01.000+01:00
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
-pytest==3.7.1
+pytest==3.7.2
 pytest-cov==2.5.1
 pytest-xdist==1.22.5
 hypothesis
