Raise minimum requirements to Drupal 10.3 and PHP 8.3 for the 2.0.x branch

Problem/Motivation

The 2.0.x branch currently declares support for Drupal 9, Drupal 10, and Drupal 11, without an explicit PHP requirement:
core_version_requirement: ^9 || ^10 || ^11

"require": {
  "drupal/core": "^9 || ^10 || ^11"
}

Drupal 9 reached end of life on November 1, 2023, and PHP 7.4 reached end of life on November 28, 2022. The most recent 2.0.x release, 2.0.4, was released on January 17, 2025.

Unreleased changes on 2.0.x use:

• PHP attributes for condition plugin metadata, supported by the core condition plugin manager in Drupal 10.3 and later.
• PHP typed class constants, which require PHP 8.3.
• Additional native property, parameter, and return types.

The declared requirements therefore no longer accurately describe the unreleased branch.

Proposed resolution

Update the module’s requirements for the 2.0.5 release to:

core_version_requirement: ^10.3 || ^11

Update composer.json consistently:

"require": {
  "php": ">=8.3",
  "drupal/core": "^10.3 || ^11"
}

This allows Composer to keep Drupal 9, Drupal 10.0–10.2, and PHP versions below 8.3 on 2.0.4 while allowing supported installations to receive 2.0.5.

Compatibility considerations

This intentionally drops support for:

• Drupal 9
• Drupal 10.0 – 10.2
• PHP versions below 8.3

Although changing platform requirements is normally treated as a compatibility change under semantic versioning, these platforms are no longer supported upstream. The change is intended to make the package metadata accurately reflect the code and prevent incompatible installations from receiving the release.

No configuration update or database update is required.