安裝Laravel-Excel(maatwebsite/excel)時，一直停在Updating dependencies (including require-dev)

安裝Laravel-Excel(maatwebsite/excel)時，一直停在Updating dependencies (including require-dev)，看不出哪有問題，從Laravel-Excel -- Installation看起來也沒錯，找半天看到Composer install doesn't actually install library，看了裡頭的回應半天，最後結論，等它update結束。

bash: composer require "maatwebsite/excel:~3.1"

有寫跟沒寫一樣，但記錄一下，免得一直以為有錯

參考網址：
Composer install doesn't actually install library