Alas, reality TV juggernaut “Keeping Up With the Kardashians” will end before fans can see Kim Kardashian’s law school graduation, Kanye West’s next prospective presidential run and/or the birth or marriage of another Kardashian-Jenner. Star-turned-beauty mogul Kardashian announced Tuesday that her family’s long-running E! reality series will air its final season in early 2021. The series’ penultimate season, its 19th, premieres Sept. 17 and will be followed by its final season in 2021. “It is with heavy hearts that we’ve made the difficult decision as a family to say goodbye to Keeping Up with the Kardashians,” she wrote to fans...