neovim: install solargraph and enable as lsp

configs/neovim.lua

@@ -59,6 +59,7 @@ local lspc = require("lspconfig")
 lspc.gopls.setup {};
 lspc.nil_ls.setup {};
 lspc.sumneko_lua.setup {};
+lspc.solargraph.setup {};
 
 o.hlsearch = true;
 

configs/neovim.nix

@@ -68,6 +68,7 @@ in {
     manix
     ripgrep
     sumneko-lua-language-server
+    rubyPackages.solargraph
   ];
   programs.neovim = {
     enable = true;