model as key not allowed anymore

[simllll]

This commit causes some troubles on my side: 90e696c

I have a model like this:

The problem here is that I have a prop called "model" in IFileUsedBy, but this is now excluded.

const fileRef = await this.StorageFileModel.findOneAndUpdate(
			{ name, container },
			{
				$setOnInsert: {
					created: new Date()
				}
			},
			{ returnDocument: 'after', upsert: true }
		)
			.lean()
			.exec();

		return fileRef; <-- should be a match to an IStorageFile

Error: src/database/StorageFileRepository.ts(19,3): error TS2322: Type 'LeanDocument<IDBStorageFile & { _id: any; }>[]' is not assignable to type 'IStorageFile[]'.
  Type 'LeanDocument<IDBStorageFile & { _id: any; }>' is not assignable to type 'IStorageFile'.
    Types of property 'usedBy' are incompatible.
      Type 'LeanDocument<IFileUsedBy>[]' is not assignable to type 'IFileUsedBy[]'.
        Property 'model' is missing in type 'LeanDocument<IFileUsedBy>' but required in type 'IFileUsedBy'.