Four years ago, Netflix bought The Roald Dahl Story Company — and with it, the rights to the entire catalog of books by the famous British author of Charlie and the Chocolate Factory, Matilda, Fantastic Mr. Fox, and The Witches. But the streamer has yet to do much with it, besides releasing a quixotic series of short-film adaptations directed by Wes Anderson. The first sign of the expected family-friendly streaming Dahlverse finally materializes this month with the release of The Twits, an animated movie adapted from Dahl’s delightfully vicious 1980 kids’ book. But the movie — directed and co-written by...