feat: Use vim.keymap.set for setting keymaps

lua/symbols-outline/utils/init.lua

@@ -2,14 +2,15 @@ local M = {}
 
 ---maps the table|string of keys to the action
 ---@param keys table|string
----@param action string
+---@param action function|string
 function M.nmap(bufnr, keys, action)
   if type(keys) == 'string' then
     keys = { keys }
   end
 
-  for _, value in ipairs(keys) do
-    vim.api.nvim_buf_set_keymap(bufnr, 'n', value, action, { silent = true, noremap = true })
+
+  for _, lhs in ipairs(keys) do
+    vim.keymap.set('n', lhs, action, { silent = true, noremap = true, buffer = bufnr })
   end
 end