Maintain status #17

Although I have fully switched to using Rust to develop my language server and related facilities, I will still continue to maintain this library when necessary.

rust-lsp-types: https://github.com/EmmyLuaLs/emmy_lsp_types
rust-dap-types: https://github.com/EmmyLuaLs/emmy_dap_types