Call for maintainers

These packages could do with more maintainers! At the moment I think I am the most active maintainer, but it would be great to have more. It would be especially good to have someone take an interest in `lsp-test`, which I've barely touched.

The issue does not identify a file, test, or entry point; start by reviewing the lsp-test package and its current maintenance needs. Done would mean agreeing on a maintainer and a concrete area of work, but the issue provides no implementation scope.

Written by the indexing model from the issue text.