Bump amqp from 2.4.2 to 2.5.0

Bumps [amqp](https://github.com/celery/py-amqp) from 2.4.2 to 2.5.0.
- [Release notes](https://github.com/celery/py-amqp/releases)
- [Changelog](https://github.com/celery/py-amqp/blob/master/Changelog)
- [Commits](celery/py-amqp@v2.4.2...2.5.0)

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

requirements.txt

@@ -5,7 +5,7 @@ psycopg2==2.8.3
 Django==1.11.22
 
 # Other
-amqp==2.4.2
+amqp==2.5.0
 pyyaml>=4.2b1
 beautifulsoup4==4.7.1
 httplib2<=0.10.3