composer update执行出来w7corp/easywechat[6.12.0, ..., 6.13.1] require ext-sodium * -> ？-灵析社区

执行 ：composer update出现下面的问题。 w7corp/easywechat  Problem 1 - w7corp/easywechat[6.12.0, ..., 6.13.1] require ext-sodium * -> it is missing from your system. Install or enable PHP's sodium extension. - Root composer.json requires w7corp/easywechat ^6.12 -> satisfiable by w7corp/easywechat[6.12.0, ..., 6.13.1].