Bump webpack from 4.42.1 to 4.43.0 in /token (solana-labs#9)

Bumps [webpack](https://github.com/webpack/webpack) from 4.42.1 to 4.43.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.42.1...v4.43.0)

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