BehaviorFindBlock doesn't work for preventxray = true

[Epirito]

In order to check line of sight to a block with mineflayer's bot.findBlock, you have to set checkExtraInfo in the matching options to true, but BehaviorFindBlock doesn't do that and thus it doesn't work. Here is a proof of concept fix:
class BehaviorCustomFindBlock implements sm.StateBehavior {
active = false;
stateName = 'customFindBlock';
blocks:any[]
bot:mf.Bot;
isFinished = false
targets:any = {}
constructor(bot:mf.Bot,targets) {
this.bot = bot
this.targets = targets
}
onStateEntered(): void
{
this.targets.position = this.targets.position = this.bot.findBlock({
matching:(block)=>this.blocks.indexOf(block.stateId)!==-1 && bot.canSeeBlock(block),
useExtraInfo:true,
maxDistance:32,
}).position
}
}