Bump rollup in /tests/code-splitting/subtests/dynamic-import/rollup

Bumps [rollup](https://github.com/rollup/rollup) from 2.0.2 to 3.29.5.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.0.2...v3.29.5)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/code-splitting/subtests/dynamic-import/rollup/package.json

@@ -4,6 +4,6 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "rollup": "^2.0.2"
+    "rollup": "^3.29.5"
   }
 }