const mostLikes = (array) => {
  const authorsAndLikesArray = _(array)
    .groupBy("author")
    .map((objs, key) => ({
      author: key,
      totalLikes: _.sumBy(objs, "likes"),
    }))
    .value();
  const sorted = _.sortBy(authorsAndLikesArray, "totalLikes").reverse();
  return sorted
};