Bump sqlalchemy from 1.1.11 to 1.3.0 in /requirements

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.1.11 to 1.3.0.
- [Release notes](https://github.com/sqlalchemy/sqlalchemy/releases)
- [Changelog](https://github.com/sqlalchemy/sqlalchemy/blob/master/CHANGES)
- [Commits](https://github.com/sqlalchemy/sqlalchemy/commits)

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

requirements/common.txt

@@ -23,7 +23,7 @@ python-dateutil==2.6.1
 python-dotenv==0.6.5
 python-editor==1.0.3
 six==1.10.0
-SQLAlchemy==1.1.11
+SQLAlchemy==1.3.0
 visitor==0.1.3
 webencodings==0.5.1
 Werkzeug==0.12.2