Add fuzzing tests
diff --git a/cmd/termmapper/main.go b/cmd/termmapper/main.go
index aa4e3e2..19b0f45 100644
--- a/cmd/termmapper/main.go
+++ b/cmd/termmapper/main.go
@@ -132,7 +132,7 @@
 		}
 
 		// Parse request body
-		var jsonData interface{}
+		var jsonData any
 		if err := c.BodyParser(&jsonData); err != nil {
 			return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
 				"error": "invalid JSON in request body",