Bump python-dateutil from 2.8.1 to 2.8.2

Bumps [python-dateutil](https://github.com/dateutil/dateutil) from 2.8.1 to 2.8.2.
- [Release notes](https://github.com/dateutil/dateutil/releases)
- [Changelog](https://github.com/dateutil/dateutil/blob/master/NEWS)
- [Commits](dateutil/dateutil@2.8.1...2.8.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -8,14 +8,14 @@ Flask-Limiter==1.4
 Flask-Login==0.6.1
 Flask-Mail==0.9.1
 Flask-Migrate==3.0.1
-Flask-Sitemap==0.3.0
+Flask-Sitemap==0.4.0
 Flask-SQLAlchemy==2.5.1
 Flask-WTF==0.15.1
 future==0.18.2
 gunicorn==19.9
 Pillow==7.2.0
 psycopg2-binary==2.9.1
-python-dateutil==2.8.1
+python-dateutil==2.8.2
 python-dotenv==0.7.1
 SQLAlchemy==1.4.21
 us==1.0