update: uploading 1.2.0 version

[f4n74z14]

This PR contain many different changes.

Most important things:

1. Every class was refactored.
2. Now using internal data folder, means old folder "v4Guard" is not used now.
3. File "vpn.key" should be also renamed to "secret.key".
4. Added reconnect packet.
5. Now account shield can accept and send UUID.
6. Event "v4GuardPostCheckEvent" was renamed to "PostCheckEvent".
7. Checks was moved from pre login state to login state to save resources when fast bot-attack is happening and antibot mitigating it. It automatically fixes an exploit to kick other player on BungeeCord, on Velocity it fixed by using a player instance from event to kick needed player.
8. Fixed an issue with PostCheckEvent when wait-mode is enabled and event cancelled, player was always hang.
9. Fixed an exploit.
10. Fixed a bug when backend is not ready you'll get an exception on plugin message event.
11. Now settings is not clearing on socket connect to avoid unexpected errors.
12. Experimental caching system was implemented to avoid scheduler creation on every check and fix all existing bugs.
13. Logging system now is more consistent. Was improved many error logging places.