Serialize jsonld

[bourgeoa]

@timbl @angelo-v The issue I have is that my patch returns a Promise<string> and not aString To serializeapplication/ld+jsonin tests I need to make the test withasync` 'await serialize(...)

• Have you any idea, how to resolve the Promise inside /rdflib/serialize.ts code
• if not. Is this kind of use acceptable :

  async function <anyname> (store, contentType) {
  ...
  const result = contentType === application/ld+json ? 
  await serialize(null, store, null, contentType) : 
  serialize(null, store, null, contentType)
  ...
  }

After testing with (/tests/data.js) the following is working for any contentType :

async function <anyname> (store, contentType) {
...
const result = await serialize(null, store, null, contentType)
...
}