See also two other places this has been fixed:
ipython/ipyparallel#934
uqfoundation/dill#707

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [dill](https://github.com/uqfoundation/dill) | project.dependencies | minor | `==0.3.9` -> `==0.4.0` |

---

### Release Notes

<details>
<summary>uqfoundation/dill (dill)</summary>

### [`v0.4.0`](https://github.com/uqfoundation/dill/releases/tag/0.4.0)

[Compare Source](uqfoundation/dill@0.3.9...0.4.0)

### 0.4.0 Release Notes

With `dill`, you can serialize almost anything in python, even an entire interpreter session.  If you encounter any pickling failures, `dill` also has some good tools to help you discover why your object fails to pickle.

`dill` installs with `pip`:
`$ pip install dill`

`dill` requires:
`- python or pypy, >=3.8`

Optional requirements:
`- pyreadline, >=1.7.1` (install with `$ pip install dill[readline]`)
`- objgraph, >=1.7.2` (install with `$ pip install dill[graph]`)

`dill` is licensed under 3-clause BSD:

    >>> import dill
    >>> print (dill.license())

To cite `dill`:

    >>> import dill
    >>> print (dill.citation())

#### What's Changed

-   update travis badge link by [@&#8203;mmckerns](https://github.com/mmckerns) in uqfoundation/dill#683
-   fix buiding documentation with sphinx 8.x by [@&#8203;kloczek](https://github.com/kloczek) in uqfoundation/dill#684
-   add initial support for python 3.14 by [@&#8203;mmckerns](https://github.com/mmckerns) in uqfoundation/dill#691
-   Bump starlette from 0.37.2 to 0.40.0 in /docs by [@&#8203;dependabot](https://github.com/dependabot) in uqfoundation/dill#686
-   fix typo in requirements.txt by [@&#8203;mmckerns](https://github.com/mmckerns) in uqfoundation/dill#693
-   updated copyright for 2025 by [@&#8203;mmckerns](https://github.com/mmckerns) in uqfoundation/dill#696
-   Bump jinja2 from 3.1.4 to 3.1.5 in /docs by [@&#8203;dependabot](https://github.com/dependabot) in uqfoundation/dill#695
-   support pypy-3.11 by [@&#8203;mmckerns](https://github.com/mmckerns) in uqfoundation/dill#701
-   update docs requirements; CI for pypy3.11 by [@&#8203;mmckerns](https://github.com/mmckerns) in uqfoundation/dill#702
-   fix CodeType support for PyPy3.11 7.3.19+ by [@&#8203;mgorny](https://github.com/mgorny) in uqfoundation/dill#707
-   move travis build of 3.9 to focal by [@&#8203;mmckerns](https://github.com/mmckerns) in uqfoundation/dill#708
-   Bump jinja2 from 3.1.5 to 3.1.6 in /docs by [@&#8203;dependabot](https://github.com/dependabot) in uqfoundation/dill#705

#### New Contributors

-   [@&#8203;kloczek](https://github.com/kloczek) made their first contribution in uqfoundation/dill#684

**Full Changelog**: uqfoundation/dill@0.3.9...0.4.0

</details>

---

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---

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Reviewed-on: https://git.tainton.uk/repos/pypilot/pulls/327
Reviewed-by: Luke Tainton <luke@tainton.uk>
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