https://www.drupal.org/project/akamai/releases/8.x-3.0-alpha7
akamai 模块 可见已经有了很多历史版本：
8.x-3.0-alpha8 - 22 July 2020
8.x-3.0-alpha7 - 30 March 2020
8.x-3.0-alpha6 - 15 January 2020
8.x-3.0-alpha5 - 30 July 2019
8.x-3.0-alpha4 - 9 May 2019
8.x-3.0-alpha3 - 27 January 2019
8.x-3.0-alpha2 - 30 July 2018
8.x-3.0-alpha1 - 1 April 2016
8.x-3.x-dev - 2 March 2016
其中找两个列子说明
1----------------------------------------------------------------------------------
akamai 8.x-3.0-alpha7
Download tar.gz48.8 KB
Download zip87.09 KB
Install with Composer: $ composer require 'drupal/akamai:^3.0'
Using Composer to manage Drupal site dependencies
Requires Drupal: ^8 || ^9
2-----------------------------------------------------------------------------------
akamai 8.x-3.0-alpha8
Download tar.gz49.5 KB
Download zip87.91 KB
Install with Composer: $ composer require 'drupal/akamai:^3.0'
Using Composer to manage Drupal site dependencies
Requires Drupal: ^8.8 || ^9
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可见依赖的core不同，但是require相同的命令，那么当你的版本在8.8以下，如何使用alpha7的版本呢
使用如下命令，会清楚掉尴尬：
composer require drupal/akamai:3.0-alpha7@alpha
祝好运！