错误提示：
Failed to download sebastian/recursion-context from dist: The zip extension and unzip command are both missing, skipping. The php.ini used by your command-line PHP is
解决办法：
打开php.ini（对应版本的）
;extension=soap
;extension=sockets
;extension=sodium
;extension=sqlite3
;extension=tidy
;extension=xsl
extension=zip //打开这里的开关