Protocol idea

Hello,
I was looking through some of the source of "BetaTester" which is meant to be for 0.10.0 beta 1.
I was wondering if I could change the code so I can allow "Alpha Final" MCPE 0.10.0 onto the server.
I saw some code here

Code:

class BetaTester extends PluginBase{

    const CURRENT_PROTOCOL = 19;
    const TARGET_PROTOCOL = 18;

    public function onEnable(){
        $this->saveDefaultConfig();

Now where is says TARGET PROTOCOL I changed it to 20 as if someone logs into the server with incorrect protocol it kicks them saying their protocol. What's wrong with it when I change it to 20 in the target protocol?
Thanks

If you're running this plugin on an older server change CURRENT_PROTOCOL to 20.

What?
You don't need the "BetaTester" plugin to allow MCPE 0.10.x clients to join, PocketMine now allow you to do that by default, but remove support for 0.9.x or older clients

CURRENT_PROTOCOL is the protocol that you want to support but PocketMine doesn't (beta). TARGET_PROTOCOL is the protocol that PocketMine currently supports.