chore: bump typescript from 4.1.4 to 4.1.5 in /web3.js (#15263)

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.1.4 to 4.1.5.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v4.1.4...v4.1.5)

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