[requires.io] dependency update

requires · requires · commit 38c850d24b75 · 2018-07-23T21:24:54.000+01:00
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
 pytest==3.6.3
 pytest-cov==2.5.1
-pytest-xdist==1.22.2
+pytest-xdist==1.22.3
 hypothesis
