Make PlayerHandshakeEvent async

Spigot-API-Patches/Add-handshake-event-to-allow-plugins-to-handle-clien.patch

@@ -7,7 +7,7 @@ Subject: [PATCH] Add handshake event to allow plugins to handle client
 
 diff --git a/src/main/java/com/destroystokyo/paper/event/player/PlayerHandshakeEvent.java b/src/main/java/com/destroystokyo/paper/event/player/PlayerHandshakeEvent.java
 new file mode 100644
-index 00000000..46d6f6ad
+index 00000000..f0bb4e31
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/event/player/PlayerHandshakeEvent.java
 @@ -0,0 +0,0 @@
@@ -49,6 +49,7 @@ index 00000000..46d6f6ad
 +     * @param cancelled if this event is enabled
 +     */
 +    public PlayerHandshakeEvent(@NotNull String originalHandshake, boolean cancelled) {
++        super(true);
 +        this.originalHandshake = originalHandshake;
 +        this.cancelled = cancelled;
 +    }