Bump sqlalchemy from 1.3.16 to 1.3.19 (#1004)

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.3.16 to 1.3.19.
- [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>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -11,7 +11,7 @@ pytz>=2018.9
 whatthepatch>=0.0.5
 icalevents==0.1.25
 icalendar==4.0.6
-sqlalchemy==1.3.16
+sqlalchemy==1.3.19
 filelock==3.0.12
 alembic==1.4.2
 numpy==1.18.4