Like this：composer update flarum/mentions
[root@vps droped]# composer require flarum/mentions
Using version ^0.1.0@beta for flarum/mentions
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Package mtdowling/cron-expression is abandoned, you should avoid using it. Use dragonmantank/cron-expression instead.
Package zerosonesfun/accordion is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/action is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/bbbbcode is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/bbcard is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/blur is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/chat is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/font is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/link-decisions is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/pop is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/spoiler is abandoned, you should avoid using it. No replacement was suggested.
Package zerosonesfun/tooltip is abandoned, you should avoid using it. No replacement was suggested.
Generating autoload files
Carbon 1 is deprecated, see how to migrate to Carbon 2.
https://carbon.nesbot.com/docs/#api-carbon-2
You can run './vendor/bin/upgrade-carbon' to get help in updating carbon and other frameworks and libraries that depend on it.
[root@vps droped]#
No matter which extension I update, it doesn't work.
[root@vps droped]# composer self-update
You are already using composer version 1.10.6 (stable channel).
[root@vps droped]#
[root@vps droped]# composer diagnose
Checking composer.json: WARNING
require.fof/split : unbound version constraints (*) should be avoided
require.fof/subscribed : unbound version constraints (*) should be avoided
require.squeevee/flarum-ext-fancybox : unbound version constraints (@beta) should be avoided
Checking platform settings: OK
Checking git settings: OK
Checking http connectivity to packagist: OK
Checking https connectivity to packagist: OK
Checking github.com rate limit: OK
Checking disk free space: OK
Checking pubkeys:
Tags Public Key Fingerprint: 57815BA2 7E54DC31 7ECC7CC5 573090D0 87719BA6 8F3BB723 4E5D42D0 84A14642
Dev Public Key Fingerprint: 4AC45767 E5EC2265 2F0C1167 CBBB8A2B 0C708369 153E328C AD90147D AFE50952
OK
Checking composer version: OK
Composer version: 1.10.6
PHP version: 7.3.15
PHP binary path: /www/server/php/73/bin/php
OpenSSL version: OpenSSL 1.0.2r 26 Feb 2019
[root@vps droped]#
