-r base.txt

psycopg2==2.7.4
gunicorn==19.9.0
gevent==1.3.4

-r base.txt

psycopg2==2.7.5
gunicorn==19.9.0
gevent==1.3.4

Bump psycopg2 from 2.7.4 to 2.7.5
Bump psycopg2 from 2.7.4 to 2.7.5

Bumps [psycopg2](https://github.com/psycopg/psycopg2) from 2.7.4 to 2.7.5.
- [Release notes](https://github.com/psycopg/psycopg2/releases)
- [Changelog](https://github.com/psycopg/psycopg2/blob/master/NEWS)
- [Commits](https://github.com/psycopg/psycopg2/commits)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>