Missing `documentEdition` task type

[Strift]

The documentEdition task type is not documented in the API reference: https://www.meilisearch.com/docs/reference/api/tasks#type

However, it appears the API can return it, as evidenced in these PHP SDK tests. Here why the test is failing:

• The SDK calls the "update documents by function" API
• The API returns a task with the documentEdition type
• Because the documentEdition type is not expected (we designed the SDK based on the docs), it throws an error

[irevoire]

Good to note also that this type can only be returned when the experimental feature has been enabled

[guimachiavelli]

Thanks for opening this issue. I'll sneak it in with the v1.15 updates, since I'm already adding another task type.