Added visible property to Tiers API

refs https://github.com/TryGhost/Team/issues/1387

This is also added to the Products API so that the Admin can use it
without having to switch to the new Tiers API.

core/server/api/canary/utils/serializers/output/products.js

@@ -74,6 +74,7 @@ function serializeProduct(product, options, apiType) {
         description: json.description,
         slug: json.slug,
         active: json.active,
+        visible: json.visible,
         type: json.type,
         welcome_page_url: json.welcome_page_url,
         created_at: json.created_at,

core/server/api/canary/utils/serializers/output/tiers.js

@@ -81,7 +81,8 @@ function serializeTier(tier, options, apiType) {
         stripe_prices: json.stripePrices ? json.stripePrices.map(price => serializeStripePrice(price, hideStripeData)) : null,
         monthly_price: serializeStripePrice(json.monthlyPrice, hideStripeData),
         yearly_price: serializeStripePrice(json.yearlyPrice, hideStripeData),
-        benefits: json.benefits || null
+        benefits: json.benefits || null,
+        visible: json.visible
     };
 
     return serialized;

test/e2e-api/admin/__snapshots__/tiers.test.js.snap

@@ -24,6 +24,7 @@ Object {
       "stripe_prices": null,
       "type": "free",
       "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+      "visible": false,
       "welcome_page_url": "/welcome-free",
     },
     Object {
@@ -37,6 +38,7 @@ Object {
       "stripe_prices": null,
       "type": "paid",
       "updated_at": StringMatching /\\\\d\\{4\\}-\\\\d\\{2\\}-\\\\d\\{2\\}T\\\\d\\{2\\}:\\\\d\\{2\\}:\\\\d\\{2\\}\\\\\\.000Z/,
+      "visible": false,
       "welcome_page_url": "/welcome-paid",
     },
   ],