Bump django from 2.2.20 to 2.2.24

Bumps [django](https://github.com/django/django) from 2.2.20 to 2.2.24.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/2.2.20...2.2.24)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
...

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

requirements/requirements.txt

@@ -1,4 +1,4 @@
-django==2.2.20
+django==2.2.24
 django-haystack==2.8.1
 django-filter==2.0.0
 djangorestframework==3.11.2

setup.py

@@ -9,7 +9,7 @@ with open(os.path.join(os.path.dirname(__file__), 'README.rst')) as readme:
 os.chdir(os.path.normpath(os.path.join(os.path.abspath(__file__), os.pardir)))
 
 install_requires = [
-    'django>=1.11.19,<2.0',
+    'django>=1.11.19,<3.0',
     'django-haystack==2.8.1',
     'django-filter==2.0.0',
     'djangorestframework==3.11.2',