There is an updated pull request by not-chicken against master on the void-packages repository

https://github.com/not-chicken/void-packages gst
https://github.com/void-linux/void-packages/pull/25313

Gstreamer 1.18.0
- Removed patches that are no longer needed.
-  Sndio plugin split as subpackage of `gst-plugins-base1`( related #25044 )
- Dropped `gst1-python` as upstream no longer supports Python 2( related #12810 )
- Documentation disabled as:
>"API and plugin documentation are no longer built with gtk_doc. The gtk_doc documentation has been removed in favour of a new unified documentation module built with hotdoc (also see "Documentation improvements" section below).
Distributors should use the documentation release tarball instead of trying to package hotdoc and building the documentation from scratch."

[Release notes](https://gstreamer.freedesktop.org/releases/1.18/)



A patch file from https://github.com/void-linux/void-packages/pull/25313.patch is attached