chore(deps-dev): bump @guardian/tsconfig from 0.2.0 to 0.3.0

Bumps [@guardian/tsconfig](https://github.com/guardian/csnx) from 0.2.0 to 0.3.0.
- [Release notes](https://github.com/guardian/csnx/releases)
- [Commits](https://github.com/guardian/csnx/compare/@guardian/[email protected]...@guardian/[email protected])

---
updated-dependencies:
- dependency-name: "@guardian/tsconfig"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -29,7 +29,7 @@
   "devDependencies": {
     "@guardian/eslint-config-typescript": "^5.0.0",
     "@guardian/prettier": "^8.0.0",
-    "@guardian/tsconfig": "^0.2.0",
+    "@guardian/tsconfig": "^0.3.0",
     "@types/jest": "^27.4.1",
     "@types/js-yaml": "^4.0.9",
     "@types/node": "20.12.8",