Add signatures for cumulative_prod

Author: kgryte

signatures/statistics/cumulative_prod.md

@@ -0,0 +1,47 @@
+# cumulative_prod
+
+## NumPy
+
+```
+numpy.cumprod(a, axis=None, dtype=None, out=None) → ndarray
+```
+
+## CuPy
+
+```
+cupy.cumprod(a, axis=None, dtype=None, out=None) → ndarray
+```
+
+## dask.array
+
+```
+dask.array.cumprod(x, axis=None, dtype=None, out=None, method='sequential') → ndarray
+```
+
+## JAX
+
+```
+jax.numpy.cumprod(a, axis=None, dtype=None, out=None) → ndarray
+```
+
+## MXNet
+
+```
+np.cumprod(a, axis=None, dtype=None, out=None) → ndarray
+```
+
+## PyTorch
+
+```
+torch.cumprod(input, dim, *, dtype=None, out=None) → Tensor
+```
+
+`dim` positional/kwarg argument is required.
+
+## TensorFlow
+
+```
+tf.math.cumprod(x, axis=0, exclusive=False, reverse=False, name=None) → Tensor
+```
+
+Uses `exclusive` kwarg to indicate whether to include the starting value and exclude the ending value