Bump pony from 0.7.17 to 0.7.19 (#100)

Bumps [pony](https://github.com/ponyorm/pony) from 0.7.17 to 0.7.19.
- [Release notes](https://github.com/ponyorm/pony/releases)
- [Changelog](https://github.com/ponyorm/pony/blob/main/CHANGELOG.md)
- [Commits](ponyorm/pony@v0.7.17...v0.7.19)

---
updated-dependencies:
- dependency-name: pony
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -3,7 +3,7 @@ autopep8==2.3.1
 gunicorn==22.0.0
 pytest==8.3.2
 coverage==7.6.0
-pony==0.7.17
+pony==0.7.19
 psycopg2==2.9.9
 flask-login==0.6.3
 Werkzeug==3.0.3