Bump asgiref from 3.3.4 to 3.4.0

Bumps [asgiref](https://github.com/django/asgiref) from 3.3.4 to 3.4.0.
- [Release notes](https://github.com/django/asgiref/releases)
- [Changelog](https://github.com/django/asgiref/blob/main/CHANGELOG.txt)
- [Commits](https://github.com/django/asgiref/commits)

---
updated-dependencies:
- dependency-name: asgiref
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements/dev.txt

@@ -8,7 +8,7 @@ alabaster==0.7.12
     # via sphinx
 appdirs==1.4.4
     # via virtualenv
-asgiref==3.3.4
+asgiref==3.4.0
     # via -r requirements/tests.in
 attrs==21.2.0
     # via pytest

requirements/tests.txt

@@ -4,7 +4,7 @@
 #
 #    pip-compile requirements/tests.in
 #
-asgiref==3.3.4
+asgiref==3.4.0
     # via -r requirements/tests.in
 attrs==21.2.0
     # via pytest