Android 12 updates

* Updated gradle version and dependencies
* Bumped compileSdkVersion and targetSdkVersion to 31
* Added support for updates without user action
* Bumped versionCode and versionName

Changes required by API level 31:
 * Added explicit exported tags to activities and receivers
 * Added explicit IMMUTABLE|MUTABLE flags to PendingIntents

app/src/main/java/com/aurora/extensions/Context.kt

@@ -96,11 +96,13 @@ fun <T> Context.open(className: Class<T>, newTask: Boolean = false) {
 }
 
 fun Context.restartApp() {
+    val flags = if (isMAndAbove()) PendingIntent.FLAG_CANCEL_CURRENT or PendingIntent.FLAG_IMMUTABLE
+    else PendingIntent.FLAG_CANCEL_CURRENT
     val pendingIntent = PendingIntent.getActivity(
         this,
         1337,
         Intent(this, MainActivity::class.java),
-        PendingIntent.FLAG_CANCEL_CURRENT
+        flags
     )
 
     val alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager