docs: Update the requirements

Change-Id: I80ea8a65317805c6542e338a92a21e6090f6c015
Signed-off-by: jdenisco <jdenisco@cisco.com>
diff --git a/docs/etc/requirements.txt b/docs/etc/requirements.txt
index c830f97..15ecd84 100644
--- a/docs/etc/requirements.txt
+++ b/docs/etc/requirements.txt
@@ -1,23 +1,23 @@
 alabaster==0.7.12
 Babel==2.6.0
-certifi==2018.10.15
+certifi==2018.11.29
 chardet==3.0.4
 CommonMark==0.5.4
 docutils==0.14
-idna==2.7
+idna==2.8
 imagesize==1.1.0
 Jinja2==2.10
-MarkupSafe==1.0
+MarkupSafe==1.1.0
 packaging==18.0
-Pygments==2.2.0
+Pygments==2.3.0
 pyparsing==2.3.0
 pytz==2018.7
 recommonmark==0.4.0
-requests==2.20.0
-six==1.11.0
+requests==2.21.0
+six==1.12.0
 snowballstemmer==1.2.1
-Sphinx==1.8.1
+Sphinx==1.8.2
 sphinx-rtd-theme==0.4.2
 sphinxcontrib-websupport==1.1.0
 typing==3.6.6
-urllib3==1.24
+urllib3==1.24.1