handle (err, formName, skip = false) {
    const e = skip ? err : this.options.errorHandler(err, formName)
    if (formName && this.registry.has(formName)) {
      this.registry.get(formName).applyErrors({
        formErrors: arrayify(e.formErrors),
        inputErrors: e.inputErrors || {}
      })
    }
    return e
  }
Given an array, this function will attempt to make sense of the given error
and hydrate a form with the resulting errors.

@param {error} err
@param {string} formName
@param {error}