LivingInCone Targeter Range doesn't support placeholders

Summary

In the @LivingInCone targeter, the range parameter doesn't support the usage of placeholders.

Steps to reproduce

1. Create a skill:

MeleeWeaponSwing:
  Skills:
  - damage{a=1} @EIC{a=95;r=<skill.range>}

3. Create a mythicitem with this:

Test:
  Id: IRON_SWORD
  Display: '&8« <#f4466c>&lTest &8»'
  Hide:
  - ATTRIBUTES
  CustomDurability:
    Durability: 4100
  Attributes:
    MainHand:
      Damage: -5
      AttackSpeed: 21
  Skills:
  - skill{s=MeleeWeaponSwing;range=5} ~onSwing

Current behavior

It hits the enemy if it's within 16 blocks (default @EIC range)

Intended correct behavior

It should've hit the enemy ONLY if it's within 5 blocks.