Srsly

* Support `cupy.ndarray` in `msgpack_numpy`.
* Make `msgpack` raise correct errors for unserializable objects if `numpy` is not installed.

* Port over esnme/ultrajson323 by timdawborn.
* Drop support for Python 2.7 and 3.5.
* Tidy up code and remove compatibility helpers.
* Add type hints.
* Improve setup and compilation.

- Port https://github.com/ultrajson/ultrajson/pull/550 and https://github.com/ultrajson/ultrajson/pull/555 to fix incorrect handling of invalid surrogate pair characters (CVE-2022-31116)
- Port https://github.com/ultrajson/ultrajson/pull/519 to fix buffer overflows ([CVE-2021-4595](https://github.com/advisories/GHSA-fh56-85cw-5pq6))

* Drop support for Python 3.5 and earlier.
* Update to cloudpickle v2.2.0 for Python 3.11 support.
* Add Python 3.11 wheels.

* Update for python 3.9

* Support `cupy.ndarray` in `msgpack_numpy`.
* Make `msgpack` raise correct errors for unserializable objects if `numpy` is not installed.