accept any number of order-queries for derivatives

[j042]

Overview

Implements #248

Addressed issues

• Derivative query forms cartesian product #248

Showcase

A short / one-liner example to highlight the (new) feature

import splinepy
import numpy as np

q = np.random.random((10000, spline.para_dim))

assert np.allclose(
    spline.jacobian(q),
    spline.derivative(q, np.eye(spline.para_dim)).transpose(0, 2, 1)
)

Checklists

• Documentations are up-to-date.
• Added example(s)
• Added test(s)

[jzwar]

There are no tests for the new feature.

[jzwar]

Thanks for Adding the tests, LGTM