[requires.io] dependency update

requires · requires · commit 4446180779d5 · 2018-01-31T00:44:47.000Z
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,3 +1,3 @@
-pytest==3.3.2
+pytest==3.4.0
 pytest-cov==2.5.1
 hypothesis
