Update version to 1.39.0

Co-authored-by: oleon <[email protected]>

Author: jplukarski

CHANGELOG.md

@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## Unreleased
+## 1.39.0
   - Update braintree-web to v3.96.0
 
 ## 1.38.1

README.md

@@ -35,7 +35,7 @@ This is a full example of a Drop-in integration that only accepts credit cards.
     <div id="dropin-container"></div>
     <button id="submit-button">Purchase</button>
 
-    <script src="https://js.braintreegateway.com/web/dropin/1.38.1/js/dropin.min.js"></script>
+    <script src="https://js.braintreegateway.com/web/dropin/1.39.0/js/dropin.min.js"></script>
 
     <script>
       var submitButton = document.querySelector('#submit-button');