Update to oik-types v2.4.2 for a fix for when Categories are attached to CPTs

Changes
| Change | Reference |
|---|---|
| Changed: Support PHP 8.3 | bobbingwide/oik-types#28 |
| Fixed: Set post type as string when specifically identified. | bobbingwide/oik-types#30 |
Tested
- Tested: With WordPress 6.6.1 and WordPress Multisite
- Tested: With PHP 8.3
- Tested: With PHPUnit 9.6
