Update dj-database-url requirement from <2.0,>=1.0 to >=2.0,<3.0 (#196)

* Update dj-database-url requirement from <2.0,>=1.0 to >=1.0,<3.0

Updates the requirements on [dj-database-url](https://github.com/jazzband/dj-database-url) to permit the latest version.
- [Release notes](https://github.com/jazzband/dj-database-url/releases)
- [Changelog](https://github.com/jazzband/dj-database-url/blob/master/CHANGELOG.md)
- [Commits](jazzband/dj-database-url@v1.0.0...v2.0.0)

---
updated-dependencies:
- dependency-name: dj-database-url
  dependency-type: direct:production
...

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

* Raise minimum dj-database-url version to 2.0

---------

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 django>=4.0,<5.0
 gunicorn>=20.0,<21.0
-dj-database-url>=1.0,<2.0
+dj-database-url>=2.0,<3.0
 whitenoise>=6.0,<7.0
 psycopg2>=2.0,<3.0