build(deps): bump buffer-layout from 1.2.0 to 1.2.1 in /token/js (sol…

…ana-labs#1729)

Bumps [buffer-layout](https://github.com/pabigot/buffer-layout) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/pabigot/buffer-layout/releases)
- [Changelog](https://github.com/pabigot/buffer-layout/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pabigot/buffer-layout/commits/v1.2.1)

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