Bumps [webpack-node-externals](https://github.com/liady/webpack-node-externals) from 2.5.1 to 2.5.2.
- [Release notes](https://github.com/liady/webpack-node-externals/releases)
- [Commits](https://github.com/liady/webpack-node-externals/compare/v2.5.1...v2.5.2

)

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