[Library] iTunes library (#5)

This PR contains the work done to implement the `iTunesService` service that fetches the reviews from the **Apple App Store**.

Reviewed-on: rock-n-code/app-reviews#5
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Libraries/Feed/Kit/Sources/Models/Review.swift

@@ -39,3 +39,22 @@ public struct Review {
     }
     
 }
+
+// MARK: - Equatable
+extension Review: Equatable {
+    
+    // MARK: Functions
+    public static func == (
+        lhs: Review,
+        rhs: Review
+    ) -> Bool {
+        lhs.author == rhs.author
+        && lhs.content == rhs.content
+        && lhs.id == rhs.id
+        && lhs.rating == rhs.rating
+        && lhs.title == rhs.title
+        && lhs.version == rhs.version
+        && lhs.updated.description == rhs.updated.description
+    }
+    
+}