v9.2

Merge branch 'bpo' into release/9

v9.1

 Backported fixes from up to v10a3 (#926)

v9.0 "Jook-Sing"

https://nutils.org/release-9.html

v8.8

backport of #880 (#881)

v8.7

backports (#873)

v8.6

locate, prod, tol (#853)

v8.5

backports of #845 & #849 (#850)

v8.4

backport of #837, #838, #834, distutils fix (#835)

v8.3

complex features (#833)

This PR adds support for

* calling `numpy.{real,imag,conjugate}` with a `Quantity` and
* linearizing a function with complex-valued arguments.

Backport of #832

v8.1

Merge branch 'cli-bpo' into release/8