Threats affecting pkg:cargo/kak-lsp

A security update for kak-lsp addresses multiple issues including compatibility regressions, hangs when editing files without trailing newlines, buffer synchronization corruption related to .editorconfig settings, and updates to default language servers. The update also refreshes the vendored crate registry and confirms that kak-lsp is not affected by several known CVEs in dependencies. Various fixes and feature enhancements are included up to version 21.0.2.