Bump python-dotenv from 0.20.0 to 0.21.0

Bumps [python-dotenv](https://github.com/theskumar/python-dotenv) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/theskumar/python-dotenv/releases)
- [Changelog](https://github.com/theskumar/python-dotenv/blob/main/CHANGELOG.md)
- [Commits](theskumar/python-dotenv@v0.20.0...v0.21.0)

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

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

pyproject.toml

@@ -8,7 +8,7 @@ authors = ["Michael Bianco <iloveitaly@gmail.com>"]
 python = "^3.8"
 todoist-api-python = "^1.1.1"
 click = "^8.1.3"
-python-dotenv = "^0.20.0"
+python-dotenv = "^0.21.0"
 pyjson5 = "^1.6.1"
 
 [tool.poetry.dev-dependencies]