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

libcaca: update to 0.99.beta20
https://github.com/void-linux/void-packages/pull/51843

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

#### Local build testing
- I built this PR locally for my native architecture: x86_64-musl
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - x86_64
  - aarch64
  - aarch64-musl
  - i686
  - i686-musl
  - armv7
  - armv7l-musl

There is no need for the `vsed` part in `pre_configure()`, it has been corrected upstream.