chore(deps): update dependency pipdeptree to v2.6.0 (#54)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [pipdeptree](https://togithub.com/tox-dev/pipdeptree)
([changelog](https://togithub.com/tox-dev/pipdeptree/blob/main/CHANGES.md))
| `2.5.2` -> `2.6.0` |
[![age](https://badges.renovateapi.com/packages/pypi/pipdeptree/2.6.0/age-slim)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://badges.renovateapi.com/packages/pypi/pipdeptree/2.6.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://badges.renovateapi.com/packages/pypi/pipdeptree/2.6.0/compatibility-slim/2.5.2)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://badges.renovateapi.com/packages/pypi/pipdeptree/2.6.0/confidence-slim/2.5.2)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>tox-dev/pipdeptree</summary>

###
[`v2.6.0`](https://togithub.com/tox-dev/pipdeptree/blob/HEAD/CHANGES.md#&#8203;260)

[Compare
Source](https://togithub.com/tox-dev/pipdeptree/compare/2.5.2...2.6.0)

-   Handle mermaid output for a reversed tree

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://app.renovatebot.com/dashboard#github/jankatins/pr-workflow-example).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNS4xMS4wIiwidXBkYXRlZEluVmVyIjoiMzUuMTEuMCJ9-->