fix: judge include type

[2heal1]

options.include can be string、array、object、undefined .
But only the string type is judged in the code. When I use the below options ,it will be error.

{
  rel: 'preload',
  include: {
    type: 'allAssets',
  }
}

[2heal1]

@sodatea this pr can solve this problem,can you review it ?😋