neovim: cursorless.nvim won’t work if user has other node remote plugins

[saidelike]

This is because atm only one place can register node functions (neovim/node-client#356). cursorless.nvim does it manually on its own, which means neither another plugin can do it in their own plugin nor can it be done in the default rplugins.vim (with “:UpdateRemotePlugins”) or it will conflict with cursorless.nvim. If that happens, the first plugin registering node functions will win and the other will fail. This will be solved by #2397