Incompatibility with Drupal 10

Hi, @Zevior!
You've reported the issue with the 8.x-1.x version but the module supports Drupal core version 10 since version 8.x-2.2.
If you want to use it on the Drupal 10 site, consider installing the respective version.

Tested it on the Drupal 10 site and the composer require 'drupal/email_validator:^2.2' command fails as well. Changing the issue version parameter and will resolve it.

Hard to test, but did it anyway putting

        "-1": {
            "type": "vcs",
            "url": "https://git.drupalcode.org/issue/email_validator-3391284.git"
        },

in composer's repositories and requiring "drupal/email_validator": "dev-3391284-drupal-10-installation-issue",
Can confirm MR fixes the issue.

Automatically closed - issue fixed for 2 weeks with no activity.