Update dependency g-plane/malva to v0.5.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
g-plane/malva	minor	v0.4.0 -> v0.5.0

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Release Notes

g-plane/malva (g-plane/malva)

### [`v0.5.0`](https://togithub.com/g-plane/malva/releases/tag/v0.5.0) [Compare Source](https://togithub.com/g-plane/malva/compare/v0.4.0...v0.5.0) #### Features - Added support of inserting heuristic linebreak when formatting lists for some AST nodes. (Close [#​11](https://togithub.com/g-plane/malva/issues/11)) #### Fixes - Fixed printing semicolons twice in Sass variable declaration. (Fix [#​10](https://togithub.com/g-plane/malva/issues/10))

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