Bump Django version to 1.11.18

requirements/edx/base.in

@@ -35,7 +35,7 @@ boto3==1.4.8                        # Amazon Web Services SDK for Python
 botocore==1.8.17                    # via boto3, s3transfer
 celery==3.1.25                      # Asynchronous task execution library
 defusedxml==0.4.1                   # XML bomb protection for common XML parsers
-Django==1.11.16                     # Web application framework
+Django==1.11.18                     # Web application framework
 django-babel-underscore             # underscore template extractor for django-babel (internationalization utilities)
 django-config-models>=0.2.2         # Configuration models for Django allowing config management with auditing
 django-cors-headers==2.1.0          # Used to allow to configure CORS headers for cross-domain requests

requirements/edx/base.txt

@@ -102,7 +102,7 @@ django-storages==1.4.1
 django-user-tasks==0.1.5
 django-waffle==0.12.0
 django-webpack-loader==0.6.0
-django==1.11.16
+django==1.11.18
 djangorestframework-jwt==1.11.0
 djangorestframework-xml==1.3.0  # via edx-enterprise
 dm.xmlsec.binding==1.3.3  # via python-saml

requirements/edx/development.txt

@@ -120,7 +120,7 @@ django-storages==1.4.1
 django-user-tasks==0.1.5
 django-waffle==0.12.0
 django-webpack-loader==0.6.0
-django==1.11.16
+django==1.11.18
 djangorestframework-jwt==1.11.0
 djangorestframework-xml==1.3.0
 dm.xmlsec.binding==1.3.3

requirements/edx/django.txt

-django==1.11.16
+django==1.11.18