Invulnerable cats don't scare creepers

To not be confused with the generic "creepers ignore cats" reports.

How to reproduce:

1. Summon a cat

2. Summon a creeper

3. Toggle the cat's invulnerability

   /data merge entity @e[type=cat,limit=1] {Invulnerable:1b}
   /data merge entity @e[type=cat,limit=1] {Invulnerable:0b}

Observed Results:

The creeper will not flee while the cat is invulnerable.

Screenshots/Videos:

In this video I also spawned a phantom, it was fleeing the invulnerable cat as expected.

https://youtu.be/sAxXtTmf6O4