Merge pull request #407 from mozilla/dependabot/npm_and_yarn/glean/mocha-9.0.0

Bump mocha from 8.4.0 to 9.0.0 in /glean

Author: Beatriz Rizental

glean/package-lock.json

@@ -93,7 +93,7 @@
     "jsdom-global": "3.0.2",
     "jsonschema": "^1.4.0",
     "madge": "^4.0.2",
-    "mocha": "^8.3.0",
+    "mocha": "^9.0.0",
     "npm-run-all": "^4.1.5",
     "selenium-webdriver": "^4.0.0-alpha.8",
     "sinon": "^11.0.0",