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

https://github.com/mhmdanas/void-packages zxing-cpp-2.0.0
https://github.com/void-linux/void-packages/pull/42335

[ci skip] zxing-cpp: update to 2.0.0.
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#### Testing the changes
- I tested the changes in this PR: **NO**

@Johnnynator

I can move the unrelated template changes into another PR if so you prefer.

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A patch file from https://github.com/void-linux/void-packages/pull/42335.patch is attached