Update CHANGELOG with 1.0.3 release

CHANGELOG.md

@@ -1,7 +1,7 @@
 # Changelog
 All notable changes to InAppUpdater will be documented in this file.
 
-## [Unreleased]
+## [1.0.3] - 2019-07-27
 ### Added
 - Method to get the Version code of the Available Update
 
@@ -11,6 +11,9 @@ All notable changes to InAppUpdater will be documented in this file.
 mUpdateManager = UpdateManager.Builder(this);
 ```
 - No need to pass Activity to `continueUpdate()`
+
+You can find these codes in the [demo app](/app/src/main/java/com/zanojmobiapps/inappupdatedemoapp/MainActivity.java)
+
 ## [1.0.3-alpha.1] - 2019-07-25
 ### Added
 - Debug Logs to the UpdateManager
@@ -22,4 +25,4 @@ mUpdateManager = UpdateManager.Builder(this);
 - Package name
 
 ## [v1.0] - 2019-07-16
-:tada: Initial Release
+:tada: Initial Release