Bump @types/split.js from 1.4.0 to 1.6.0 in /Build

Bumps [@types/split.js](https://github.com/nathancahill/split) from 1.4.0 to 1.6.0.
- [Release notes](https://github.com/nathancahill/split/releases)
- [Changelog](https://github.com/nathancahill/split/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nathancahill/split/commits)

---
updated-dependencies:
- dependency-name: "@types/split.js"
  dependency-version: 1.6.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Build/package-lock.json

@@ -41,7 +41,7 @@
   "devDependencies": {
     "@types/file-saver": "^2.0.7",
     "@types/prettier": "^3.0.0",
-    "@types/split.js": "^1.4.0",
+    "@types/split.js": "^1.6.0",
     "copy-webpack-plugin": "^13.0.0",
     "htmlhint": "^1.6.3",
     "ts-loader": "^9.5.2",