SPIGOT-5803: Add Piglin/Zoglin Baby API

src/main/java/org/bukkit/craftbukkit/entity/CraftPiglin.java

@@ -11,6 +11,16 @@ public class CraftPiglin extends CraftMonster implements Piglin {
         super(server, entity);
     }
 
+    @Override
+    public boolean isBaby() {
+        return getHandle().isBaby();
+    }
+
+    @Override
+    public void setBaby(boolean flag) {
+        getHandle().a(flag);
+    }
+
     @Override
     public EntityPiglin getHandle() {
         return (EntityPiglin) super.getHandle();

src/main/java/org/bukkit/craftbukkit/entity/CraftZoglin.java

@@ -11,6 +11,16 @@ public class CraftZoglin extends CraftMonster implements Zoglin {
         super(server, entity);
     }
 
+    @Override
+    public boolean isBaby() {
+        return getHandle().isBaby();
+    }
+
+    @Override
+    public void setBaby(boolean flag) {
+        getHandle().a(flag);
+    }
+
     @Override
     public EntityZoglin getHandle() {
         return (EntityZoglin) entity;