no source header in error objects

[ennorehling]

error objects have setSourcePointer and setSourceParameter methods, but there is no setSourceHeader as described by https://jsonapi.org/format/#error-objects

Are there any alternatives if I want my error to contain [ 'source' => [ 'header' => 'Foo-Bar' ] ], or is this a missing feature?

[lindyhopchris]

That was added in JSON:API 1.1, but I haven't had the time to go through the changes in the spec and add new features like that, which is why the package is still on 1.0.