Bump django from 2.2.12 to 2.2.13 (#2493)

Bumps [django](https://github.com/django/django) from 2.2.12 to 2.2.13.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.2.12...2.2.13)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -21,7 +21,7 @@ git+https://github.com/DefectDojo/django-tastypie-swagger.git@c7c5629480dc20cadd
 django-tastypie==0.14.2
 django-watson==1.5.5
 django-prometheus==2.0.0
-Django==2.2.12
+Django==2.2.13
 djangorestframework==3.11.0
 gunicorn==20.0.4
 html2text==2020.1.16

setup.py

@@ -9,7 +9,7 @@
     description="Tool for managing vulnerability engagements",
     install_requires=[
         'defusedxml',
-        'Django==2.2.12',
+        'Django==2.2.13',
         'django-auditlog==0.4.0',
         'django-custom-field',
         'django-filter==1.0.4',