Bump jinja2 from 2.10.1 to 2.11.3 in /requirements

Bumps [jinja2](https://github.com/pallets/jinja) from 2.10.1 to 2.11.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/CHANGES.rst)
- [Commits](pallets/jinja@2.10.1...2.11.3)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements/requirements-docs.txt

@@ -4,28 +4,47 @@
 #
 #    pip-compile --output-file requirements/requirements-docs.txt setup.py requirements/requirements-docs.in
 #
-alabaster==0.7.10         # via sphinx
-babel==2.5.3              # via sphinx
-certifi==2018.1.18        # via requests
-cffi==1.11.5
-chardet==3.0.4            # via requests
-docutils==0.14            # via sphinx
-idna==2.6                 # via requests
-imagesize==1.0.0          # via sphinx
-jinja2==2.10.1            # via sphinx
-markupsafe==1.0           # via jinja2
-numpy==1.14.2
-packaging==17.1           # via sphinx
-pandas==0.22.0
-pycparser==2.18           # via cffi
-pygments==2.2.0           # via sphinx
-pyparsing==2.2.0          # via packaging
+alabaster==0.7.10
+    # via sphinx
+babel==2.5.3
+    # via sphinx
+certifi==2018.1.18
+    # via requests
+chardet==3.0.4
+    # via requests
+docutils==0.14
+    # via sphinx
+idna==2.6
+    # via requests
+imagesize==1.0.0
+    # via sphinx
+jinja2==2.11.3
+    # via sphinx
+markupsafe==1.0
+    # via jinja2
+packaging==17.1
+    # via sphinx
+pygments==2.2.0
+    # via sphinx
+pyparsing==2.2.0
+    # via packaging
 pytest-runner==4.2
-python-dateutil==2.7.2    # via pandas
-pytz==2018.3              # via babel, pandas
-requests==2.21.0          # via sphinx
-six==1.11.0               # via packaging, python-dateutil, sphinx
-snowballstemmer==1.2.1    # via sphinx
+    # via -r requirements-docs.in
+pytz==2018.3
+    # via babel
+requests==2.21.0
+    # via sphinx
+six==1.11.0
+    # via
+    #   packaging
+    #   sphinx
+snowballstemmer==1.2.1
+    # via sphinx
 sphinx==1.7.2
-sphinxcontrib-websupport==1.0.1  # via sphinx
-urllib3==1.24.2           # via requests
+    # via -r requirements-docs.in
+sphinxcontrib-websupport==1.0.1
+    # via sphinx
+typing==3.7.4.3
+    # via sphinx
+urllib3==1.24.2
+    # via requests