Creakings are affected by knockback from mace smash attacks

The Bug:

Creakings are affected by knockback from mace smash attacks.

Steps to Reproduce:

1. Summon a creaking and summon an armor next to it.
2. Obtain a mace and perform a smash attack on the armor stand.
3. Observe if the creaking takes knockback.

Observed Behavior:

Creakings are affected by knockback from mace smash attacks.

Expected Behavior:

Creakings would not be affected by knockback from mace smash attacks.