Add beta update functionality

Author: sindresorhus

app/package.json

@@ -1,7 +1,7 @@
 {
   "name": "kap",
-  "productName": "Kap",
-  "version": "1.0.1",
+  "productName": "Kap Beta",
+  "version": "2.0.0-beta.2",
   "description": "The best way to record your screen",
   "license": "MIT",
   "repository": "wulkano/kap",

app/src/main/auto-updater.js

@@ -4,7 +4,8 @@ import ms from 'ms';
 import {log} from '../common/logger';
 import reporter from '../common/reporter';
 
-const FEED_URL = `https://kap-updates.now.sh/update/osx/${app.getVersion()}`;
+const URL_APP_NAME = app.getName() === 'Kap Beta' ? 'kap-beta' : 'kap';
+const FEED_URL = `https://${URL_APP_NAME}-updates.now.sh/update/macos/${app.getVersion()}`;
 
 function createInterval() {
   return setInterval(() => {