Version 1.3 release.

Updates CHANGELOG, version, docs.
diff --git a/docs/dyn/androidpublisher_v2.edits.html b/docs/dyn/androidpublisher_v2.edits.html
index b99b297..686793e 100644
--- a/docs/dyn/androidpublisher_v2.edits.html
+++ b/docs/dyn/androidpublisher_v2.edits.html
@@ -126,6 +126,9 @@
 <p class="toc_element">
   <code><a href="#insert">insert(packageName, body)</a></code></p>
 <p class="firstline">Creates a new edit for an app, populated with the app's current state.</p>
+<p class="toc_element">
+  <code><a href="#validate">validate(packageName, editId)</a></code></p>
+<p class="firstline">Checks that the edit can be successfully committed. The edit's changes are not applied to the live app.</p>
 <h3>Method Details</h3>
 <div class="method">
     <code class="details" id="commit">commit(packageName, editId)</code>
@@ -195,4 +198,21 @@
   }</pre>
 </div>
 
+<div class="method">
+    <code class="details" id="validate">validate(packageName, editId)</code>
+  <pre>Checks that the edit can be successfully committed. The edit's changes are not applied to the live app.
+
+Args:
+  packageName: string, Unique identifier for the Android app that is being updated; for example, "com.spiffygame". (required)
+  editId: string, Unique identifier for this edit. (required)
+
+Returns:
+  An object of the form:
+
+    { # Represents an edit of an app. An edit allows clients to make multiple changes before committing them in one operation.
+    "expiryTimeSeconds": "A String", # The time at which the edit will expire and will be no longer valid for use in any subsequent API calls (encoded as seconds since the Epoch).
+    "id": "A String", # The ID of the edit that can be used in subsequent API calls.
+  }</pre>
+</div>
+
 </body></html>
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