feat: update lsp config

c: make nvim-cmp capabalities available
lua: ignore some non-standard keywords

.config/nvim/lua/lsp/c.lua

@@ -3,11 +3,18 @@
 -- License       : GPLv3
 -- Description   : clangd config file for lsp
 
+-- The nvim-cmp almost supports LSP's capabilities so You should advertise it to LSP servers..
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
+
+
 require("lspconfig").clangd.setup {
         cmd = { "clangd",
                 "--background-index",
                 "--suggest-missing-includes",
                 "--clang-tidy",
                 "--header-insertion=iwyu"
-        }
+        },
+        -- The following example advertise capabilities to `clangd`.
+        capabilities = capabilities,
 }

.config/nvim/lua/lsp/lua.lua

@@ -21,7 +21,7 @@ require'lspconfig'.sumneko_lua.setup {
                         },
                         diagnostics = {
                                 -- Get the language server to recognize the `vim` global
-                                globals = {'vim'},
+                                globals = {"vim", "use", "globals", "utils"},
                         },
                         workspace = {
                                 -- Make the server aware of Neovim runtime files