Update redcarpet version to v3.1.0
Update redcarpet version to v3.1.0

luvtechno/garage,luvtechno/garage,cookpad/garage,taiki45/garage,cookpad/garage,kenchan0130/garage,taiki45/garage,kenchan0130/garage,takashi/garage,taiki45/garage,takashi/garage,takashi/garage,luvtechno/garage,kenchan0130/garage,y-yagi/garage,cookpad/garage,y-yagi/garage,y-yagi/garage,cookpad/garage