Workplace software firm Asana, which last raised money at a valuation of $1.5 billion in 2018, has filed to go public through a direct listing. For its 2020 fiscal year ended Jan. 31, Asana reported revenue of $142.6 million, an 86% increase from the $76.8 million it reported the previous year. Asana’s net loss more than doubled during the period, from $50.9 million to $118.6 million,...