Update dependency python-dotenv to v0.21.1

This MR contains the following updates:

Package	Update	Change
python-dotenv	minor	==0.20.0 -> ==0.21.1

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Release Notes

theskumar/python-dotenv (python-dotenv)

v0.21.1

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Added

• Use Python 3.11 non-beta in CI (#​438 by [@​bbc2])
• Modernize variables code (#​434 by [@​Nougat-Waffle])
• Modernize main.py and parser.py code (#​435 by [@​Nougat-Waffle])
• Improve conciseness of cli.py and init.py (#​439 by [@​Nougat-Waffle])
• Improve error message for get and list commands when env file can't be opened (#​441 by [@​bbc2])
• Updated License to align with BSD OSI template (#​433 by [@​lsmith77])

Fixed

• Fix Out-of-scope error when "dest" variable is undefined (#​413 by [@​theGOTOguy])
• Fix IPython test warning about deprecated magic (#​440 by [@​bbc2])
• Fix type hint for dotenv_path var, add StrPath alias (#​432 by [@​eaf])

v0.21.0

Compare Source

Added

• CLI: add support for invocations via 'python -m'. (#​395 by [@​theskumar])
• load_dotenv function now returns False. (#​388 by [@​larsks])
• CLI: add --format= option to list command. (#​407 by [@​sammck])

Fixed

• Drop Python 3.5 and 3.6 and upgrade GA (#​393 by [@​eggplants])
• Use open instead of io.open. (#​389 by [@​rabinadk1])
• Improve documentation for variables without a value (#​390 by [@​bbc2])
• Add parse_it to Related Projects (#​410 by [@​naorlivne])
• Update README.md (#​415 by [@​harveer07])
• Improve documentation with direct use of MkDocs (#​398 by [@​bbc2])

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