use .. name for root node for compatibility

Author: alex-courtis

lua/nvim-tree/explorer/init.lua

@@ -52,7 +52,7 @@ function Explorer:new(path)
   ---@type Explorer
   local placeholder = nil
 
-  local o = DirectoryNode.new(self, placeholder, nil, path, nil, nil)
+  local o = DirectoryNode.new(self, placeholder, nil, path, "..", nil)
   ---@cast o Explorer
 
   o.explorer = self

lua/nvim-tree/node/directory.lua

@@ -13,7 +13,7 @@ local DirectoryNode = BaseNode:new()
 ---@param explorer Explorer
 -----@param parent DirectoryNode    -- TODO  #2871 #2886
 ---@param absolute_path string
----@param name string|nil
+---@param name string
 ---@param fs_stat uv.fs_stat.result|nil
 ---@return DirectoryNode
 function DirectoryNode:new(explorer, parent, absolute_path, name, fs_stat)

lua/nvim-tree/node/init.lua

@@ -10,7 +10,7 @@ local git = require("nvim-tree.git")
 ---@field git_status GitStatus|nil
 ---@field hidden boolean
 ---@field is_dot boolean
----@field name string|nil
+---@field name string
 ---@field parent DirectoryNode|nil
 ---@field watcher Watcher|nil
 ---@field diag_status DiagStatus|nil