[requires.io] dependency update

requires · requires · commit e0e4be032e01 · 2018-01-31T00:47:58.000Z
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
-pytest==3.3.2
+pytest==3.4.0
 pytest-cov==2.5.1
 pytest-xdist==1.22.0
 hypothesis
