Bump alembic from 1.0.8 to 1.0.9
Bump alembic from 1.0.8 to 1.0.9

Bumps [alembic](https://alembic.sqlalchemy.org) from 1.0.8 to 1.0.9.

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
svenstaro/python-web-boilerplate,svenstaro/python-web-boilerplate