chore(deps): update dependency ubuntu_lints to ^0.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ubuntu_lints (source)	dev_dependencies	minor	^0.3.0 -> ^0.4.0

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Release Notes

canonical/ubuntu-flutter-plugins (ubuntu_lints)

### [`v0.4.0`](https://togithub.com/canonical/ubuntu-flutter-plugins/blob/HEAD/packages/ubuntu_lints/CHANGELOG.md#040) > Note: This release has breaking changes. - **BREAKING** **FEAT**: Require trailing commas on overflow.

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