Bump sqlalchemy from 1.3.3 to 1.3.15 (#111)

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.3.3 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] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

requirements-constraints.txt

@@ -22,8 +22,8 @@ Jinja2==2.11.1 \
 itsdangerous==1.1.0 \
     --hash=sha256:321b033d07f2a4136d3ec762eac9f16a10ccd60f53c0c91af90217ace7ba1f19 \
     --hash=sha256:b12271b2047cb23eeb98c8b5622e2e5c5e9abd9784a153e9d8ef9cb4dd09d749
-SQLAlchemy==1.3.3 \
-    --hash=sha256:91c54ca8345008fceaec987e10924bf07dcab36c442925357e5a467b36a38319
+SQLAlchemy==1.3.15 \
+    --hash=sha256:c4cca4aed606297afbe90d4306b49ad3a4cd36feb3f87e4bfd655c57fd9ef445
 MarkupSafe==1.1.1 \
     --hash=sha256:00bc623926325b26bb9605ae9eae8a215691f33cae5df11ca5424f06f2d1f473 \
     --hash=sha256:09027a7803a62ca78792ad89403b1b7a73a01c8cb65909cd876f7fcebd79b161 \