poetry upgrades fail if pyproject.toml contains an empty key.

[dreid]

Is there an existing issue for this?

• [X] I have searched the existing issues

Package ecosystem

pip

Package manager version

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Language version

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Manifest location and content before the Dependabot update

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dependabot.yml content

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Updated dependency

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What you expected to see, versus what you actually saw

Expected to see dependabot update dependencies, instead the updater crashed with the following error:

updater | 2024/01/29 21:15:53 ERROR Failed to parse input on line 191 at offset 1
updater |  = "src"

This is due to a long-standing bug with toml-rb failing to properly dump empty keys which has been fixed in toml-rb 3.0.1

https://github.com/emancu/toml-rb/releases/tag/v3.0.1

Native package manager behavior

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Images of the diff or a link to the PR, issue, or logs

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Smallest manifest that reproduces the issue

[tool.setuptools]
package-dir = {"" = "src"}