Proper fix for the async issues

Thanks to @TBlueF, this library should now have no more issues with sync and async stuff! Thank you very much for your contrubition, Blue!

What's Changed

• Use CompletableFutures for async update checking by @TBlueF in #1
• Removed the override functionality that was added in v2.2 again, because it's not necessary anymore

New Contributors

• @TBlueF made their first contribution in #1

Full Changelog: v2.2...v2.3