fix(deps): update dependency when to v3.7.8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
when (source)	3.7.7 -> 3.7.8

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Release Notes

cujojs/when

### [`v3.7.8`](https://togithub.com/cujojs/when/releases/tag/3.7.8): : Unhandled rejection fixes [Compare Source](https://togithub.com/cujojs/when/compare/3.7.7...3.7.8) - Fix unhandled rejection false positive in `settle` - Fix unhandled rejection events on IE - Make build work on Windows

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[Rob--W]

Superseded by #136