[requires.io] dependency update

requires · requires · commit 747251717b4b · 2018-02-21T00:18:16.000Z
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
-pytest==3.4.0
+pytest==3.4.1
 pytest-cov==2.5.1
 coverage==4.5.1
 pytest-xdist==1.22.1
