[requires.io] dependency update

requires · requires · commit d6217290326b · 2017-08-24T15:04:19.000-05:00
diff --git a/test_requirements.txt b/test_requirements.txt
@@ -1,4 +1,4 @@
 pytest==3.2.1
 pytest-cov==2.5.1
 pytest-xdist==1.20.0
-hypothesis==3.21.0
+hypothesis==3.21.1
