fix: turtleUtils.tryDrop should return when no item to drop

turtle-utils.lua

@@ -25,7 +25,17 @@ turtleUtils.trySuckUp = function()
 end
 
 turtleUtils.tryDrop = function()
-  while not turtle.drop() do
+  while true do
+    if turtle.getItemCount() == 0 then
+      return false
+    end
+
+    local dropOk = turtle.drop();
+
+    if (dropOk) then
+      return true
+    end
+
     os.sleep(IDLE_TIME)
   end
 end