Bump django from 2.2.7 to 2.2.8

Bumps [django](https://github.com/django/django) from 2.2.7 to 2.2.8.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/2.2.7...2.2.8)

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

requirements-dev.txt

@@ -17,7 +17,7 @@ django-crispy-forms==1.8.0
 django-debug-toolbar==2.0
 django-extensions==2.2.5
 django-select2==5.11.1
-django==2.2.7
+django==2.2.8
 icalendar==4.0.3
 ipython-genutils==0.2.0   # via traitlets
 ipython==7.9.0
@@ -40,4 +40,4 @@ wcwidth==0.1.7            # via prompt-toolkit
 webencodings==0.5.1       # via bleach
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools==41.6.0        # via ipython, markdown
+# setuptools

requirements.txt

@@ -13,7 +13,7 @@ django-bower==5.2.0
 django-colorful==1.3
 django-crispy-forms==1.8.0
 django-select2==5.11.1
-django==2.2.7
+django==2.2.8
 icalendar==4.0.3
 jinja2==2.10.3
 markdown==3.1.1
@@ -25,4 +25,4 @@ sqlparse==0.3.0           # via django
 webencodings==0.5.1       # via bleach
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools==41.6.0        # via markdown
+# setuptools