Bump mocha from 9.0.3 to 9.1.0 in /samples/web-extension/typescript

Bumps [mocha](https://github.com/mochajs/mocha) from 9.0.3 to 9.1.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v9.0.3...v9.1.0)

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

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

Author: dependabot[bot]

samples/web-extension/typescript/package-lock.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "@types/mocha": "^9.0.0",
     "@types/node": "^16.7.1",
-    "mocha": "^9.0.3",
+    "mocha": "^9.1.0",
     "ts-loader": "^9.2.5",
     "typescript": "^4.3.5",
     "web-ext-types": "^3.2.1",