function minimistParse(args, options) {
  /* c8 ignore next */
  const boolean = options.boolean ?? [];
  /* c8 ignore next */
  const defaults = options.default ?? {};

  const booleanWithoutDefault = boolean.filter((key) => !(key in defaults));
  const newDefaults = {
    ...defaults,
    ...Object.fromEntries(
      booleanWithoutDefault.map((key) => [key, PLACEHOLDER]),
    ),
  };

  const parsed = minimist(args, { ...options, default: newDefaults });

  return Object.fromEntries(
    Object.entries(parsed).filter(([, value]) => value !== PLACEHOLDER),
  );
}
unspecified boolean flag without default value is parsed as `undefined` instead of `false`