Fixed #317 Replace comparison in are_arrays_equal

Author: seanlaw

stumpy/core.py

@@ -214,10 +214,7 @@ def are_arrays_equal(a, b):  # pragma: no cover
     if id(a) == id(b):
         return True
 
-    if a.shape != b.shape:
-        return False
-
-    return ((a == b) | (np.isnan(a) & np.isnan(b))).all()
+    return np.array_equal(a, b, equal_nan=True)
 
 
 def are_distances_too_small(a, threshold=10e-6):  # pragma: no cover