SecureFieldsConfigUpdate

type SecureFieldsConfigUpdate = Partial<{
  fields: Partial<{ [key in AllowedFields]: Omit<SecureFieldsFieldConfig, "target"> }>;
  hostedForm: HostedFormUIOptions;
  styles: SecureFieldsHostedFieldsConfig["styles"];
  theme: SecureFieldsTheme;
}>;

Partial update for SecureFieldsConfig. Only the specified keys are updated; everything else is left as it is.