added labels equatable check to ListDiffable isEqual method, fixes #715 (#716)

Author: joerocca

Classes/Models/RepositoryLabel.swift

@@ -9,7 +9,7 @@
 import Foundation
 import IGListKit
 
-final class RepositoryLabel: ListDiffable {
+final class RepositoryLabel: ListDiffable, Equatable {
 
     let color: String
     let name: String
@@ -30,5 +30,12 @@ final class RepositoryLabel: ListDiffable {
         guard let object = object as? RepositoryLabel else { return false }
         return color == object.color
     }
+    
+    //MARK: Equatable
+    
+    static func ==(lhs: RepositoryLabel, rhs: RepositoryLabel) -> Bool {
+        return lhs.name == rhs.name
+            && lhs.color == rhs.color
+    }
 
 }

Classes/Repository/RepositoryIssueSummaryModel.swift

@@ -56,5 +56,6 @@ class RepositoryIssueSummaryModel: ListDiffable {
             && author == object.author
             && created == object.created
             && title.attributedText.string == object.title.attributedText.string
+            && labels == object.labels
     }
 }