macOS Big Sur 11.2.3, Python 3.8, metpy 1.0. The temperature conversion to degrees celsius results in an attribute error: 'DataArray' object has no attribute 'to' <img width="846" alt="Screen Shot 2021-04-16 at 6 31 06 PM" src="https://user-images.githubusercontent.com/76788494/115090095-ef9ff580-9ee1-11eb-8a7a-1fb39af8fa11.png"> and 'DataArray' object has no attribute 'm' for smooth_hght.m <img width="996" alt="Screen Shot 2021-04-16 at 6 35 45 PM" src="https://user-images.githubusercontent.com/76788494/115090345-984e5500-9ee2-11eb-85d1-2d56ef9fa5ba.png">