[requires.io] dependency update

requires · requires · commit adc154a2aab5 · 2017-12-06T03:51:01.000Z
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,3 +1,3 @@
-pytest==3.3.0
+pytest==3.3.1
 hypothesis
 coverage==4.4.2
