Bump django from 1.11.29 to 2.2.24

Bumps [django](https://github.com/django/django) from 1.11.29 to 2.2.24.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@1.11.29...2.2.24)

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

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

requirements.txt

@@ -6,7 +6,7 @@ hiredis==0.2.0
 # 这个项目在py3下有一些兼容性问题，因此我们重写了它
 # py_lru_cache==0.1.4
 
-Django==1.11.29
+Django==2.2.24
 django-redis==4.8.0
 django-braces==1.11.0
 django-filter==1.0.4