message: fix(typescript): Fix `data` property definition in
diff: @@ -3,14 +3,14 @@ export interface FeathersErrorJSON {
  readonly message: string;
  readonly code: number;
  readonly className: string;
  - readonly data: any;
  + readonly data?: any;
  readonly errors: any;
  }
  export class FeathersError extends Error {
  readonly code: number;
  readonly className: string;
  - readonly data: any;
  + readonly data?: unknown;
  readonly errors: any;
  constructor (msg: string | Error, name: string, code: number, className: string, data: any);
  toJSON (): FeathersErrorJSON;
  