[requires.io] dependency update

requires · requires · commit ae75818c3cd1 · 2017-10-05T19:37:28.000-05:00
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
 pytest==3.2.3
 pytest-cov==2.5.1
-pytest-xdist==1.20.0
+pytest-xdist==1.20.1
 hypothesis
