fix(models): restore external IDs on Track and Album - #472

fix(models): restore external IDs on Track and Album#472

dargmuesli merged 2 commits into

docs/migration/add-v9-to-v10-guidespotify-web-api-java/spotify-web-api-java:docs/migration/add-v9-to-v10-guidefrom

fix/models/restore-external-idsspotify-web-api-java/spotify-web-api-java:fix/models/restore-external-idsCopy head branch name to clipboard