Bump fakeredis from 1.5.1 to 1.5.2 in /requirements

Bumps [fakeredis](https://github.com/jamesls/fakeredis) from 1.5.1 to 1.5.2.
- [Release notes](https://github.com/jamesls/fakeredis/releases)
- [Commits](jamesls/fakeredis@1.5.1...1.5.2)

---
updated-dependencies:
- dependency-name: fakeredis
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

requirements/dev.txt

@@ -8,4 +8,4 @@ django-debug-toolbar==3.2.1
 pylint==2.5.3
 black==21.5b2
 pre-commit==2.13.0
-fakeredis==1.5.1
+fakeredis==1.5.2