chore(deps): bump python-dotenv from 0.17.1 to 0.18.0 (#1125)

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 0.17.1 to 0.18.0.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/master/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v0.17.1...v0.18.0)

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

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

Author: dependabot-preview[bot]

requirements.txt

@@ -8,6 +8,6 @@ flask-restx==0.5.0
 Flask-Testing==0.8.1
 gunicorn==20.0.4
 psycopg2-binary==2.8.6
-python-dotenv==0.17.1
+python-dotenv==0.18.0
 six==1.11.0
 pre-commit