changelog and bump IterableAPI to v6.4.17

Author: jyu115

CHANGELOG.md

@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [6.4.17]
+
+### Changed
+
+- IterableTaskRunner’s stop function now to set `running` variable as `false`
+
 ## [6.4.16]
 
 ### Added

swift-sdk/IterableAPI.swift

@@ -7,7 +7,7 @@ import UIKit
 
 @objcMembers public final class IterableAPI: NSObject {
     /// The current SDK version
-    public static let sdkVersion = "6.4.16"
+    public static let sdkVersion = "6.4.17"
 
     /// The email of the logged in user that this IterableAPI is using
     public static var email: String? {