build(deps): bump amplitude from 5.2.0 to 6.0.0 (#13867)

Bumps [amplitude](https://github.com/geoffdutton/amplitude) from 5.2.0 to 6.0.0.
- [Release notes](https://github.com/geoffdutton/amplitude/releases)
- [Changelog](https://github.com/geoffdutton/amplitude/blob/master/CHANGELOG.md)
- [Commits](https://github.com/geoffdutton/amplitude/commits)

---
updated-dependencies:
- dependency-name: amplitude
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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package.json

@@ -12,7 +12,7 @@
     "@slack/webhook": "^6.1.0",
     "accepts": "^1.3.8",
     "amazon-payments": "^0.2.9",
-    "amplitude": "^5.2.0",
+    "amplitude": "^6.0.0",
     "apidoc": "^0.50.4",
     "apple-auth": "^1.0.7",
     "bcrypt": "^5.0.1",