Bump channels from 3.0.1 to 3.0.3 (#284)

Bumps [channels](https://github.com/django/channels) from 3.0.1 to 3.0.3.
- [Release notes](https://github.com/django/channels/releases)
- [Changelog](https://github.com/django/channels/blob/main/CHANGELOG.txt)
- [Commits](django/channels@3.0.1...3.0.3)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements-django30.txt

@@ -34,7 +34,7 @@ cffi==1.14.3
     # via cryptography
 channels-redis==3.2.0
     # via -r requirements/base.txt
-channels==3.0.1
+channels==3.0.3
     # via
     #   -r requirements/base.txt
     #   channels-redis

requirements-django31.txt

@@ -34,7 +34,7 @@ cffi==1.14.3
     # via cryptography
 channels-redis==3.2.0
     # via -r requirements/base.txt
-channels==3.0.1
+channels==3.0.3
     # via
     #   -r requirements/base.txt
     #   channels-redis

requirements.txt

@@ -34,7 +34,7 @@ cffi==1.14.3
     # via cryptography
 channels-redis==3.2.0
     # via -r requirements/base.txt
-channels==3.0.1
+channels==3.0.3
     # via
     #   -r requirements/base.txt
     #   channels-redis