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

jsoncpp: update to 1.9.5.
https://github.com/void-linux/void-packages/pull/45201

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

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#### New package
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#### Local build testing
*ongoing*
- I built this PR locally for my native architecture, (ARCH-LIBC)
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - aarch64-musl
  - armv7l
  - armv6l-musl