Fix for issue #738

Added Unsubscribed value to the EventInfoState enumeration

Octokit.Tests/Models/IssueEventTests.cs

@@ -89,5 +89,6 @@ public class IssueEventTests
         var issueEvent = serializer.Deserialize<IssueEvent>(json);
 
         Assert.NotNull(issueEvent);
+        Assert.Equal(EventInfoState.Unsubscribed, issueEvent.Event);
     }
 }

Octokit/Models/Response/EventInfo.cs

@@ -162,5 +162,10 @@ namespace Octokit
         /// The pull request’s branch was restored.
         /// </summary>
         HeadRefRestored,
+
+        /// <summary>
+        /// The actor unsubscribed from notifications for an issue.
+        /// </summary>
+        Unsubscribed,
     }
 }