Bump is-buffer from 2.0.3 to 2.0.4 (#13705)

Bumps [is-buffer](https://github.com/feross/is-buffer) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/feross/is-buffer/releases)
- [Commits](https://github.com/feross/is-buffer/compare/v2.0.3...v2.0.4

)

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