Bump browser-sync from 2.26.14 to 2.27.4 (#2213)

Bumps [browser-sync](https://github.com/BrowserSync/browser-sync) from 2.26.14 to 2.27.4.
- [Release notes](https://github.com/BrowserSync/browser-sync/releases)
- [Changelog](https://github.com/BrowserSync/browser-sync/blob/master/CHANGELOG.md)
- [Commits](https://github.com/BrowserSync/browser-sync/compare/v2.26.14...v2.27.4)

---
updated-dependencies:
- dependency-name: browser-sync
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -72,7 +72,7 @@
     "@types/superagent": "^4.1.10",
     "adf-tslint-rules": "0.0.7",
     "ajv-cli": "^4.2.0",
-    "browser-sync": "^2.26.14",
+    "browser-sync": "^2.27.4",
     "chalk": "^4.1.0",
     "codelyzer": "^6.0.1",
     "commander": "^6.1.0",