Update pytest from 3.7.4 to 3.8.0 (#149)

pyup-bot · Mariatta · commit 85c6a4e1ba47 · 2018-09-11T08:47:42.000-07:00
diff --git a/dev-requirements.txt b/dev-requirements.txt
@@ -1,5 +1,5 @@
 -r requirements.txt
-pytest==3.7.4
+pytest==3.8.0
 pytest-asyncio==0.9.0
 pytest-aiohttp==0.3.0
 requests-mock==1.5.2
