chore(deps): update rust crate shlex to v2 (#679)

[Molter73]

Description

This is a backport of #679.

The MintMaker update all updates workflow is broken on the release-0.3 branch due to a version bump in the shlex dependency, said dependency needs to be bumped to 2.0.1 but some other dependencies still need version 1.*. For some reason, this does not seem to be supported by MintMaker, but doing the update manually is not too hard and should not happen very often. See #726 for the detailed error message from MintMaker.

Checklist

• Patch has a change log entry OR does not need one.
• Investigated and inspected CI test results
• Updated documentation accordingly

Automated testing

• Added unit tests
• Added integration tests
• Added regression tests

If any of these don't apply, please comment below.

Testing Performed

This version of shlex has been used in the main branch for the past couple of weeks with no problems.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

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• Commit unit tests in branch mauro/backport/shlex-update

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