- neovim added new diagnostics api in https://github.com/neovim/neovim/pull/15585.
So I've added a new diagnostics source named `nvim` (Yes I couldn't
find a name for it :P) that shows diagnostics from that api.
In neovim nightly with vim.diagnostics you can consider source
`nvim_lsp` obsolete.
- Diagnostics source `vim_lsp` was removed in a mistake now it's
restored.