In 2013, legendary Japanese animator Hayao Miyazaki claimed he was retiring after the release of his film “The Wind Rises,” which was nominated for an Academy Award for best animated feature. It’s a common refrain for Miyazaki, who said he was retiring after “Princess Mononoke” and the Oscar-winning “Spirited Away.” But he has yet to stick with retirement, as evidenced by the release of his first film in a decade, the enchanting “The Boy and the Heron.” Based on the 1937 book “How Do You Live?” by Genzaburo Yoshino, which was given to Miyazaki in his youth by his mother, “The Boy and the Heron…