Bump django-cors-headers from 3.0.2 to 3.2.1 (#50)

Bumps [django-cors-headers](https://github.com/adamchainz/django-cors-headers) from 3.0.2 to 3.2.1.
- [Release notes](https://github.com/adamchainz/django-cors-headers/releases)
- [Changelog](https://github.com/adamchainz/django-cors-headers/blob/master/HISTORY.rst)
- [Commits](adamchainz/django-cors-headers@3.0.2...3.2.1)

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

requirements.txt

@@ -1,3 +1,3 @@
 Django==2.2.8
-django-cors-headers==3.0.2
+django-cors-headers==3.2.1
 mecab-python3==0.7