Captcha Keypad 2.0.0 Drupal 12 support, and the first release on the semantic versioning branch. Drupal 8 and 9 are no longer supported: core_version_requirement is now ^10.2 || ^11 || ^12. Fixes a captcha bypass in standalone mode, where the expected code was sent to the browser in a hidden field and validation compared that field against the submitted response. It is now signed with the site private key. Fixes the keypad being unusable in a browser on Drupal 10 and later, and a wrong code producing an error with no message. Issue #3596099.