Maybe this is intentional, but I noticed that this bow can hit endermen both with its regular shots and the ability.

Was intentional originally, I'll add a config line for those who are opposed to this mechanic.
Edit: Nevermind, I'll keep in consistent with the other projectile immune bosses and make the Enderman immune too.

I believe it is still possible to hit enderman with the darkmoon bow.

Yes, a rework to make it compatible with projectile damage attribute and ranged weapon api made it work on enderman again, but I feel like I will keep this in.