Update appcast.xml

Author: intitni

appcast.xml

@@ -3,6 +3,18 @@
   <channel>
     <title>Copilot for Xcode</title>
 
+    <item>
+      <title>0.13.4</title>
+      <pubDate>Thu, 27 Apr 2023 10:54:46 +0800</pubDate>
+      <sparkle:version>110</sparkle:version>
+      <sparkle:shortVersionString>0.13.4</sparkle:shortVersionString>
+      <sparkle:minimumSystemVersion>12.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>
+        https://github.com/intitni/CopilotForXcode/releases/tag/0.13.4
+      </sparkle:releaseNotesLink>
+      <enclosure url="https://github.com/intitni/CopilotForXcode/releases/download/0.13.4/Copilot.for.Xcode.app.zip" length="20125854" type="application/octet-stream" sparkle:edSignature="HwcykvtjfR8u8iwDLQFDhlrw212eiDkzsK9ixtzRfeFfaccqpxmHewsMAAG+aEhN3jUjqD384TowlvfdGZaLAw=="/>
+    </item>
+
     <item>
       <title>0.13.2</title>
       <pubDate>Sun, 23 Apr 2023 18:03:30 +0800</pubDate>