Bump sqlalchemy from 1.3.13 to 1.3.15 (#150)
Bump sqlalchemy from 1.3.13 to 1.3.15 (#150)

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.3.13 to 1.3.15.
- [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-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
alex/revocation-tracker,alex/revocation-tracker