[pavog]

The latest files and the categories are included in the mod returned by the API, but Mod::getLatestFiles() and Mod::getCategories() returned them as generated models. They now return the File and Category wrappers, so their fetch* methods can be used without another lookup:

// before
$file = $client->getModFile($mod->getId(), $mod->getLatestFiles()[0]->getId());
$changelog = $file->fetchChangelog();

// after
$changelog = $mod->getLatestFiles()[0]->fetchChangelog();

Changes

• Mod::getLatestFiles() returns File[], Mod::getCategories() returns Category[]. Both still return null if the data is missing, so the JSON serialization of a mod does not change.
• Mod::getPrimaryCategory() uses getCategories() instead of wrapping the category itself.
• README: example for the latest files and categories of a mod.

Tests

• New unit tests check that both getters return wrappers without sending a request, that the wrappers can send requests themselves, and that null is returned if the data is missing.
• The serialization test also checks the nested files and categories.