Update dependency browser-sync to v2.27.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
browser-sync (source)	2.27.8 -> 2.27.9

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Release Notes

BrowserSync/browser-sync

### [`v2.27.9`](https://togithub.com/BrowserSync/browser-sync/releases/v2.27.9) [Compare Source](https://togithub.com/BrowserSync/browser-sync/compare/v2.27.8...v2.27.9) #### What's Changed - fix(cli): Where's the command help? fixes [#​1929](https://togithub.com/BrowserSync/browser-sync/issues/1929) by [@​shakyShane](https://togithub.com/shakyShane) in https://github.com/BrowserSync/browser-sync/pull/1945 A bug prevented the help output from displaying - it was introduced when the CLI parser `yargs` was updated, and is now fixed :) **Full Changelog**: https://github.com/BrowserSync/browser-sync/compare/v2.27.8...v2.27.9

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