fix: close view before hijacking current window

lua/nvim-tree/lib.lua

@@ -98,6 +98,7 @@ function M.open(cwd)
     core.init(cwd or vim.loop.cwd())
   end
   if should_hijack_current_buf() then
+    view.close()
     view.open_in_current_win()
     renderer.draw()
   else