Dropdown property doesn't work with numeric keys

[rasmusbe]

What I expected

The saved values in admin

What happened instead

Invalid values in admin

Steps to reproduce

papi_property(
	[
		'title'    => __( 'File list', 'bbws-admin' ),
		'type'     => 'dropdown',
		'slug'     => 'list',
		'settings' => [
			'items' => [
				'Hello' => 1,
				'World' => 2
			]
		]
	]
)

Select World and save. Saved value is 2. Displayed value in admin is Hello.

What versions of softwares are you using?

• Papi: latest
• WordPress: latest

[sasimon]

At some point during the admin page load process the value retrieved needs to be explicitly cast as a string. I'm just not sure where.