There is an updated pull request by tranzystorek-io against master on the void-packages repository

https://github.com/tranzystorek-io/void-packages cava
https://github.com/void-linux/void-packages/pull/45539

cava: update to 0.9.0
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#### Testing the changes
- I tested the changes in this PR: **YES**

Ping @skmpz 

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A patch file from https://github.com/void-linux/void-packages/pull/45539.patch is attached