fix(config): remove node 5.7.0 testing until it can be setup properly
fix(config): remove node 5.7.0 testing until it can be setup properly

gdgphilippines/boomerang,Splaktar/boomerang,GDGWellington/GDGWellington.github.io,dbs/boomerang,BruGTUG/BruGTUG.github.io,gdgphilippines/main,gdg-x/boomerang,GDGWellington/GDGWellington.github.io,gdgphilippines/main,gdg-x/boomerang,gdgphilippines/boomerang,Splaktar/boomerang,gdgphilippines/boomerang,gdgphilippines/main,BruGTUG/BruGTUG.github.io,gdgphilippines/main,gdgphilippines/main,gdgphilippines/boomerang,dbs/boomerang,gdgphilippines/boomerang