Bump split2 from 3.2.2 to 4.1.0

Bumps [split2](https://github.com/mcollina/split2) from 3.2.2 to 4.1.0.
- [Release notes](https://github.com/mcollina/split2/releases)
- [Commits](mcollina/split2@v3.2.2...v4.1.0)

---
updated-dependencies:
- dependency-name: split2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -33,7 +33,7 @@
     "fastify": "^3.11.0",
     "pre-commit": "^1.2.2",
     "snazzy": "^9.0.0",
-    "split2": "^3.2.2",
+    "split2": "^4.1.0",
     "standard": "^16.0.1",
     "tap": "^15.0.2",
     "tsd": "^0.18.0"