There's a closed pull request on the void-packages repository

nsxiv: update to 31
https://github.com/void-linux/void-packages/pull/43404

Description:
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#### Testing the changes
- I tested the changes in this PR: **YES**

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#### New package
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#### Local build testing
- I built this PR locally for my native architecture, **musl**
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - x86_64
  - i686

@WitherCubes