Bump djangorestframework from 3.7.7 to 3.10.1

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.7.7 to 3.10.1.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.7.7...3.10.1)

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

requirements.txt

@@ -11,7 +11,7 @@ ipython==6.2.1
 boto==2.48.0
 moto==0.4.31
 flake8==3.5.0
-djangorestframework==3.7.7
+djangorestframework==3.10.1
 djangorestframework-httpsignature==1.0.0
 djangocms-admin-style==1.2.7
 lxml==3.8.0