Scheduled monthly dependency update for May (#125)

* Update sphinx from 2.0.0 to 2.0.1

* Update isort from 4.3.16 to 4.3.17

* Update pytest from 4.4.0 to 4.4.1

* Update pytest-mock from 1.10.3 to 1.10.4

Author: pyup-bot

docs/requirements.txt

@@ -1,4 +1,4 @@
 docutils==0.14
 Pygments==2.3.1
-Sphinx==2.0.0
+Sphinx==2.0.1
 sphinxcontrib-websupport==1.1.0

tests/requirements.txt

@@ -2,13 +2,13 @@ black==19.3b0
 coverage==4.5.3
 docutils==0.14
 flake8==3.7.7
-isort==4.3.16
+isort==4.3.17
 pycodestyle==2.5.0
 pyflakes==2.1.1
-pytest==4.4.0
+pytest==4.4.1
 pytest-aiohttp==0.3.0
 pytest-cov==2.6.1
-pytest-mock==1.10.3
+pytest-mock==1.10.4
 pytest-sugar==0.9.2
 pytest-timeout==1.3.3
 pytest-toolbox==0.4