Add product blacklisting mutation (#18)

src/resolvers/products-resolver.ts

@@ -87,4 +87,11 @@ export const productMutationTypeDefs = {
     );
     return (<ProductAPI>dataSources.productApi).getProduct(productId);
   },
+  async productBlacklisting(_, { productId, markets }, { dataSources }) {
+    await (<ProductAPI>dataSources.productApi).updateBlacklisting(
+      productId,
+      markets,
+    );
+    return (<ProductAPI>dataSources.productApi).getProduct(productId);
+  },
 };