[requires.io] dependency update

requires · requires · commit ff7ad183de7b · 2018-02-20T06:59:56.000Z
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
 pytest==3.4.0
 pytest-cov==2.5.1
-pytest-xdist==1.22.0
+pytest-xdist==1.22.1
 hypothesis
