build(deps-dev): bump xo from 1.1.1 to 1.2.1

Bumps [xo](https://github.com/xojs/xo) from 1.1.1 to 1.2.1.
- [Release notes](https://github.com/xojs/xo/releases)
- [Commits](xojs/xo@v1.1.1...v1.2.1)

---
updated-dependencies:
- dependency-name: xo
  dependency-version: 1.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -59,7 +59,7 @@
     "postcss": "^8.5.6",
     "postcss-cli": "^11.0.1",
     "prettier": "^3.6.2",
-    "xo": "^1.1.1"
+    "xo": "^1.2.1"
   },
   "browserslist": [
     ">= 0.5%",