python-dotenv: update to v1.0.0

- 1.0.0:

  - What's Changed:
    - Handle situations where the cwd does not exist.
    - Add python-decouple as a related project
    - Drop support for python 3.7, add python 3.12-dev

- 0.21.1:

  - Added:
    - Use Python 3.11 non-beta in CI
    - Modernize variables code
    - Modernize main.py and parser.py code
    - Improve conciseness of cli.py and init.py
    - Improve error message for get and list commands when env file
    can't be opened
    - Updated Licence to align with BSD OSI template

Signed-off-by: Javier Marcet <javier@marcet.info>