Error with typescript - bad types

[jasir]

Error:(245, 3) TS2416: Property 'toJSON' in type 'Document' is not assignable to the same property in base type 'Collection'.
  Type '(arg?: string | undefined, onAnchor?: ((value: any, count: number) => void) | undefined) => any' is not assignable to type '(arg?: any, ctx?: NodeToJsonContext | undefined) => any'.
    Types of parameters 'onAnchor' and 'ctx' are incompatible.
      Type 'NodeToJsonContext | undefined' is not assignable to type '((value: any, count: number) => void) | undefined'.
        Type 'NodeToJsonContext' is not assignable to type '(value: any, count: number) => void'.
          Type 'NodeToJsonContext' provides no match for the signature '(value: any, count: number): void'.

[eemeli]

This is fixed in patch release 1.9.2