Update dependencies.

requirements-dev.txt

@@ -1,16 +1,16 @@
 -e .[dev]
 alabaster==0.7.10
 arrow==0.10.0
-babel==2.4.0
-binaryornot==0.4.3
-certifi==2017.4.17
+babel==2.5.1
+binaryornot==0.4.4
+certifi==2017.7.27.1
 chardet==3.0.4
 click==6.7
 cookiecutter==1.5.1
 coverage==4.4.1
-docutils==0.13.1
+docutils==0.14
 future==0.16.0
-idna==2.5
+idna==2.6
 imagesize==0.7.1
 jinja2-time==0.2.0
 jinja2==2.9.6
@@ -21,14 +21,14 @@ pygments==2.2.0
 pytest-cov==2.5.1
 pytest-sugar==0.8.0
 pytest-timeout==1.2.0
-pytest==3.1.3
+pytest==3.2.2
 python-dateutil==2.6.1
 pytz==2017.2
-requests==2.18.1
-six==1.10.0
+requests==2.18.4
+six==1.11.0
 snowballstemmer==1.2.1
-sphinx==1.6.3
+sphinx==1.6.4
 sphinxcontrib-websupport==1.0.1
 termcolor==1.1.0
-urllib3==1.21.1
+urllib3==1.22
 whichcraft==0.4.1