LONDON - Meghan Markle has her heart set on becoming Diana 2.0, according to a new biography that details her lifelong embrace of good causes but also points to a calculating streak. The Suits star, who is set to marry on May 19 this year, is fiercely protective and sidelines people as she moves ahead in life, according to people cited in the book. Meghan: A Hollywood Princess, which is due out in Britain on Thursday, details how the 36-year-old US actor ditched her first husband. The biography is authored by Andrew Morton, the British royal writer who penned the blockbuster Diana: Her True Story. He also details Markle’s fascination with Prince Harry’s mother Diana around the time of her death in 1997, watching her funeral in tears. Family friends said she was intrigued by Diana “not just for her