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

cherrytree: update to 0.99.27
https://github.com/void-linux/void-packages/pull/27418

Description:
They decided to use gtest, which is fine, but it seems as though they expect gtest to be pulled in as a sub module, which, of course, ends up being an empty folder in the release tar ball. 

As seen here:

https://github.com/giuspen/cherrytree/tree/master/tests

If I pull in gtest, as it expects, it tests out properly, but I'm not sure how to do that properly for a void build, so I opted to disable the testing.

Always happy to learn better way to deal with things like this.