Bump python-dotenv from 0.19.2 to 0.20.0

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 0.19.2 to 0.20.0.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/master/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v0.19.2...v0.20.0)

---
updated-dependencies:
- dependency-name: python-dotenv
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

poetry.lock

@@ -32,7 +32,7 @@ pptree = "^3.1"
 types-redis = ">=3.5.9,<5.0.0"
 types-six = "^1.16.1"
 python-ulid = "^1.0.3"
-python-dotenv = "^0.19.1"
+python-dotenv = ">=0.19.1,<0.21.0"
 cleo = "1.0.0a4"
 typing-extensions = "^4.0.0"
 hiredis = "^2.0.0"