fix(deps): bump django from 2.2.18 to 2.2.20 (#1509)

* build(deps): bump django from 2.2.18 to 2.2.20

Bumps [django](https://github.com/django/django) from 2.2.18 to 2.2.20.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.2.18...2.2.20)

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

* Merge branch 'development' into dependabot/pip/django-2.2.20

setup.py

@@ -22,7 +22,7 @@
     package_dir={"aimmo": "aimmo"},
     include_package_data=True,
     install_requires=[
-        "django==2.2.18",
+        "django==2.2.20",
         "django-js-reverse==0.9.1",
         "djangorestframework==3.12.2",
         "eventlet==0.29.1",