Make app actually quit for update

Before, it was just minimizing and the app wouldn't even update because
electron-updater expects to be able to close the app.

src/main/index.js

@@ -436,6 +436,9 @@ app.on('before-quit', event => {
     shutdownDaemonAndQuit();
   } else {
     console.log('Quitting.');
+    if (autoUpdating) {
+      minimize = false;
+    }
   }
 });
 
@@ -522,6 +525,11 @@ ipcMain.on('version-info-requested', () => {
   });
 });
 
+ipcMain.on('autoUpdate', () => {
+  minimize = false;
+  autoUpdater.quitAndInstall();
+});
+
 ipcMain.on('get-auth-token', event => {
   Keytar.getPassword('LBRY', 'auth_token').then(token => {
     event.sender.send('auth-token-response', token ? token.toString().trim() : null);