Newcastle United are about to finish what has been a gruelling season. Eddie Howe takes his team to Brentford in the Premier League on Sunday and briefly over to Australia for a post-season tour. After that, at least some of the Newcastle squad will be able to rest. That isn’t the case for all of them, however. Indeed, the fact there is a European Championship and a Copa America this summer means some of Howe’s squad will be heading into some of the biggest tournaments of their lives. One of those could be well Anthony Gordon. The winger has shone this season, scoring 12 goals and registering …