fix: dispose of luma service

Author: Justintime50

CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## Next Release
+
+- Disposes of Luma service
+
 ## v7.2.0 (2025-06-18)
 
 - Adds the following functions

EasyPost/Client.cs

@@ -216,6 +216,7 @@ protected override void Dispose(bool disposing)
             EndShipper.Dispose();
             Event.Dispose();
             Insurance.Dispose();
+            Luma.Dispose();
             Order.Dispose();
             Parcel.Dispose();
             Pickup.Dispose();