The 1999 teen hit is set to become a Broadway musical with the Girls creator and pop singer-songwriter teaming up Nearly 30 years after it cemented 1999 as a watershed year for teen movies, 10 Things I Hate About You is headed to Broadway, led by Lena Dunham and Carly Rae Jepsen. Dunham, the creator of another coming-of-age touchstone with HBO's Girls, will co-write the adaptation with playwright Jessica Huang. Pop s…