adding in some needed packages

Assets/DamageNumbersPro/Scripts/Settings/FollowSettings.cs

@@ -0,0 +1,21 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace DamageNumbersPro
+{
+    [System.Serializable]
+    public struct FollowSettings
+    {
+        public FollowSettings(float customDefault)
+        {
+            speed = 10;
+            drag = 0f;
+        }
+
+        [Tooltip("Speed at which target is followed.")]
+        public float speed;
+        [Tooltip("Decreases follow speed over time.")]
+        public float drag;
+    }
+}