Update PULL_REQUEST_TEMPLATE.md (#1928)
Update PULL_REQUEST_TEMPLATE.md (#1928)


IllusionMH/tslint,nchen63/tslint,andy-hanson/tslint,mprobst/tslint,IllusionMH/tslint,YuichiNukiyama/tslint,palantir/tslint,berickson1/tslint,RyanCavanaugh/tslint,palantir/tslint,andy-hanson/tslint,RyanCavanaugh/tslint,mprobst/tslint,andy-ms/tslint,RyanCavanaugh/tslint,JoshuaKGoldberg/tslint,JoshuaKGoldberg/tslint,mprobst/tslint,nchen63/tslint,andy-hanson/tslint,palantir/tslint,andy-ms/tslint,IllusionMH/tslint,berickson1/tslint,nchen63/tslint,YuichiNukiyama/tslint,YuichiNukiyama/tslint,JoshuaKGoldberg/tslint,berickson1/tslint,andy-ms/tslint