Change potion structure for plays and game history

[antoinezanardi]

In plays and game history structures, potion(s) usage is represented by { potion: { life: true, death: true } }.

In order to follow boolean variable naming rules and because a target can't drink both potions at the same time, change the structure to:

{
    hasDrankLifePotion: true,
    hasDrankDeathPotion: true,
}