Add Flare (#1862)

@ns-vasilev thanks!

Author: ns-vasilev

contents.json

@@ -1186,6 +1186,12 @@
       "description":"Lightweight In App Purchases framework.",
       "homepage":"https://github.com/bizz84/SwiftyStoreKit"
     },
+    {
+      "title":"Flare",
+      "category":"app-store",
+      "description":"A framework that simplifies working with in-app purchases on iOS, macOS, tvOS, and watchOS, with full support for both StoreKit 1 and StoreKit 2.",
+      "homepage":"https://github.com/space-code/flare"
+    },
     {
       "title":"AudioKit",
       "category":"audio",