travis: Update slack integration
travis: Update slack integration

NetSys/quilt,NetSys/quilt,kklin/kelda,kelda/kelda,quilt/quilt,NetSys/quilt,kelda/kelda,kklin/quilt,kklin/quilt,quilt/quilt,quilt/quilt,kelda/kelda,LuiseV/quilt,NetSys/quilt,kklin/quilt,kklin/quilt,LuiseV/quilt,LuiseV/quilt,LuiseV/quilt,LuiseV/quilt,quilt/quilt,kklin/kelda,kklin/kelda,kelda/kelda,kklin/kelda,NetSys/quilt