fix matplotlib==3.7.0 import

Author: tylerflex

tidy3d/components/types.py

@@ -11,7 +11,7 @@
 
 import pydantic
 import numpy as np
-from matplotlib.axes._subplots import Axes
+from matplotlib.axes import Axes
 from shapely.geometry.base import BaseGeometry
 from ..log import ValidationError