build(deps-dev): bump chai from 4.3.7 to 4.3.8

Bumps [chai](https://github.com/chaijs/chai) from 4.3.7 to 4.3.8.
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/4.x.x/History.md)
- [Commits](chaijs/chai@v4.3.7...v4.3.8)

---
updated-dependencies:
- dependency-name: chai
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -5,7 +5,7 @@
   "version": "1.2.1",
   "main": "gulpfile.js",
   "devDependencies": {
-    "chai": "^4.3.7",
+    "chai": "^4.3.8",
     "gulp": "^4.0.2",
     "gulp-data": "^1.3.1",
     "gulp-load-plugins": "^2.0.8",