Fix updater

Author: Rokt33r

app/updater.js

@@ -24,22 +24,21 @@ autoUpdater.on('error', error => {
 })
 
 autoUpdater.on('update-available', () => {
-  dialog.showMessageBox(
-    {
+  dialog
+    .showMessageBox({
       type: 'info',
       title: 'Found Updates',
       message: 'Found updates, do you want update now?',
       buttons: ['Sure', 'No']
-    },
-    buttonIndex => {
-      if (buttonIndex === 0) {
+    })
+    .then(({ response }) => {
+      if (response === 0) {
         autoUpdater.downloadUpdate()
       } else {
         updater.enabled = true
         updater = null
       }
-    }
-  )
+    })
 })
 
 autoUpdater.on('update-not-available', () => {
@@ -52,15 +51,14 @@ autoUpdater.on('update-not-available', () => {
 })
 
 autoUpdater.on('update-downloaded', () => {
-  dialog.showMessageBox(
-    {
+  dialog
+    .showMessageBox({
       title: 'Install Updates',
       message: 'Updates downloaded, application will be quit for update...'
-    },
-    () => {
+    })
+    .then(() => {
       setImmediate(() => autoUpdater.quitAndInstall())
-    }
-  )
+    })
 })
 
 // export this to MenuItem click callback