chore(deps-dev): bump @types/split2 from 2.1.6 to 3.2.0 (#3291)

Bumps [@types/split2](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/split2) from 2.1.6 to 3.2.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/split2)

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