Upgrade gatling-build-plugin 1.8.9
Upgrade gatling-build-plugin 1.8.9

timve/gatling,GabrielPlassard/gatling,timve/gatling,thkluge/gatling,ryez/gatling,timve/gatling,MykolaB/gatling,pwielgolaski/gatling,gatling/gatling,gatling/gatling,ryez/gatling,wiacekm/gatling,MykolaB/gatling,pwielgolaski/gatling,GabrielPlassard/gatling,thkluge/gatling,gatling/gatling,timve/gatling,MykolaB/gatling,ryez/gatling,MykolaB/gatling,gatling/gatling,wiacekm/gatling,gatling/gatling,wiacekm/gatling,GabrielPlassard/gatling,pwielgolaski/gatling,ryez/gatling,pwielgolaski/gatling,wiacekm/gatling,GabrielPlassard/gatling,wiacekm/gatling,thkluge/gatling,thkluge/gatling