make Vector3 constructor private

common/api/util/src/main/java/com/dfsek/terra/api/util/vector/Vector2.java

@@ -135,7 +135,7 @@ public class Vector2 implements Cloneable {
     }
     
     public Vector3 extrude(double y) {
-        return new Vector3(this.x, y, this.z);
+        return Vector3.of(this.x, y, this.z);
     }
     
     public Vector2 add(double x, double z) {

common/api/util/src/main/java/com/dfsek/terra/api/util/vector/Vector3.java

@@ -20,7 +20,7 @@ public class Vector3 implements Cloneable {
     private double y;
     private double z;
     
-    public Vector3(double x, double y, double z) {
+    private Vector3(double x, double y, double z) {
         this.x = x;
         this.y = y;
         this.z = z;