An American woman has won the 2018 Boston Marathon. The last time a woman won the storied Boston race was in 1985, when Michigan’s Lisa Larsen Rainsberger won with a time of 2:34:06. In grueling weather conditions, Desiree Linden, 34, crossed the finish line in 2:39.54 seconds; that’s nearly 20 minutes off the record time, but…