Version 1.3 release.

Updates CHANGELOG, version, docs.
diff --git a/docs/dyn/genomics_v1beta.beacons.html b/docs/dyn/genomics_v1beta.beacons.html
index a296481..7138c3f 100644
--- a/docs/dyn/genomics_v1beta.beacons.html
+++ b/docs/dyn/genomics_v1beta.beacons.html
@@ -75,23 +75,23 @@
 <h1><a href="genomics_v1beta.html">Genomics API</a> . <a href="genomics_v1beta.beacons.html">beacons</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#get">get(datasetId, allele=None, position=None, contig=None)</a></code></p>
+  <code><a href="#get">get(variantSetId, allele=None, referenceName=None, position=None)</a></code></p>
 <p class="firstline">This is an experimental API that provides a Global Alliance for Genomics and Health Beacon. It may change at any time.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="get">get(datasetId, allele=None, position=None, contig=None)</code>
+    <code class="details" id="get">get(variantSetId, allele=None, referenceName=None, position=None)</code>
   <pre>This is an experimental API that provides a Global Alliance for Genomics and Health Beacon. It may change at any time.
 
 Args:
-  datasetId: string, The ID of the dataset to query over. It must be public. Private datasets will return an unauthorized exception. (required)
+  variantSetId: string, The ID of the variant set to query over. It must be public. Private variant sets will return an unauthorized exception. (required)
   allele: string, Required. The allele to look for ('A', 'C', 'G' or 'T').
-  position: string, Required. The 1-based position to query at.
-  contig: string, Required. The contig to query over.
+  referenceName: string, Required. The reference to query over.
+  position: string, Required. The 0-based position to query.
 
 Returns:
   An object of the form:
 
-    { # A beacon represents whether any variant call in a dataset has a specific allele at a particular position.
+    { # A beacon represents whether any variant call in a variant set has a specific allele at a particular position.
     "exists": True or False, # True if the allele exists on any variant call, false otherwise.
   }</pre>
 </div>