install.sh: More automation

install.sh

@@ -153,7 +153,9 @@ main() {
   if _NVIM="$(command -v nvim)"; then
     if _check_nvim_version; then
       printf "\n%s\n" "=> Neovim will now open." && sleep 1
-      "${_NVIM}" +":lua require 'pluginList' vim.cmd('PackerSync')"
+      "${_NVIM}" +"autocmd User PackerComplete ++once quitall" \
+        +":lua require 'pluginList' vim.cmd('PackerSync')"
+      "${_NVIM}"
     else
       printf "Error: Neovim is installed, but version is lower than 0.5.x, install Neovim >= 5.x and then run nvim & do :PackerSync\n."
     fi