chore(deps): Bump shellingham from 1.3.2 to 1.4.0 (#324)

Bumps [shellingham](https://github.com/sarugaku/shellingham) from 1.3.2 to 1.4.0.
- [Release notes](https://github.com/sarugaku/shellingham/releases)
- [Changelog](https://github.com/sarugaku/shellingham/blob/master/CHANGELOG.rst)
- [Commits](sarugaku/shellingham@1.3.2...1.4.0)

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