Bump sqlalchemy from 1.2.8 to 1.3.0

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.2.8 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>

Author: dependabot[bot]

requirements.txt

@@ -17,7 +17,7 @@ python-dateutil==2.7.3
 python-editor==1.0.3
 requests==2.19.1
 six==1.11.0
-SQLAlchemy==1.2.8
+SQLAlchemy==1.3.0
 urllib3==1.23
 Werkzeug==0.16.1
 boto3==1.9.169