v1.3.0-beta.1

Update to Electron 1.7.11 (#1996)

Fixed: Crash during input via Chinese IME on Mac (#1996)

Fixed: Expired disappearing messages would sometimes remain in
conversation (#1983)

package.json

@@ -3,7 +3,7 @@
   "productName": "Signal",
   "description": "Private messaging from your desktop",
   "repository": "https://github.com/WhisperSystems/Signal-Desktop.git",
-  "version": "1.2.0-beta.2",
+  "version": "1.3.0-beta.1",
   "license": "GPL-3.0",
   "author": {
     "name": "Open Whisper Systems",