fix(deps): update lumino packages

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@lumino/default-theme	2.1.6 -> 2.1.7
@lumino/widgets	2.4.0 -> 2.5.0

---

Release Notes

jupyterlab/lumino (@​lumino/default-theme)

### [`v2.1.7`](https://togithub.com/jupyterlab/lumino/compare/@lumino/default-theme@2.1.6...@lumino/default-theme@2.1.7) [Compare Source](https://togithub.com/jupyterlab/lumino/compare/@lumino/default-theme@2.1.6...@lumino/default-theme@2.1.7)

---

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.

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.