Merge pull request 'Add Tag interface' (#2) from feature/tags2 into 2.x

Reviewed-on: #2

src/interfaces/tag.ts

@@ -0,0 +1,4 @@
+export interface Tag {
+  id?: number;
+  label: string;
+}

src/interfaces/tournament.ts

@@ -1,6 +1,7 @@
 import { Category } from "./category";
 import { Club } from "./club";
 import { Official } from "./official";
+import { Tag } from "./tag";
 import { TeamCategory } from "./team-category";
 
 export interface Tournament {
@@ -24,4 +25,5 @@ export interface Tournament {
     drawUrl: string | null;
     notificationsSentAt?: Date | null;
     '@type'?: string;
+    tags?: Tag[];
 }