v1.0.28

No changes; this release is to test auto-upgrade signature verification
on Windows.

FREEBIE

package.json

@@ -3,7 +3,7 @@
   "productName": "Signal",
   "description": "Private messaging from your desktop",
   "repository": "https://github.com/WhisperSystems/Signal-Desktop.git",
-  "version": "1.0.27",
+  "version": "1.0.28",
   "license": "GPL-3.0",
   "author": {
     "name": "Open Whisper Systems",