Upgrading all dependencies (#539)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [react](https://react.dev/)
([source](https://redirect.github.com/facebook/react/tree/HEAD/packages/react))
| [`^18.3.1` ->
`^19.0.0`](https://renovatebot.com/diffs/npm/react/18.3.1/19.0.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/react/19.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/react/19.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/react/18.3.1/19.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/react/18.3.1/19.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>facebook/react (react)</summary>

###
[`v19.0.0`](https://redirect.github.com/facebook/react/compare/v18.3.1...63cde684f5340b1ca73f6244501aac1c3d2c92a8)

[Compare
Source](https://redirect.github.com/facebook/react/compare/v18.3.1...v19.0.0)

</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 was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
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---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Robin Tail <robin_tail@me.com>

packages/merge-sx/package.json

@@ -44,7 +44,7 @@
   "devDependencies": {
     "@emotion/styled": "^11.13.5",
     "@mui/material": "^6.1.9",
-    "react": "^18.3.1"
+    "react": "^19.0.0"
   },
   "keywords": [
     "react",