chore(deps): bump stripe from 12.18.0 to 15.5.0

Bumps [stripe](https://github.com/stripe/stripe-node) from 12.18.0 to 15.5.0.
- [Release notes](https://github.com/stripe/stripe-node/releases)
- [Changelog](https://github.com/stripe/stripe-node/blob/master/CHANGELOG.md)
- [Commits](stripe/stripe-node@v12.18.0...v15.5.0)

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

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

package.json

@@ -66,7 +66,7 @@
     "remove-markdown": "^0.5.0",
     "rimraf": "^3.0.2",
     "short-uuid": "^4.2.2",
-    "stripe": "^12.18.0",
+    "stripe": "^15.5.0",
     "superagent": "^8.1.2",
     "universal-analytics": "^0.5.3",
     "useragent": "^2.1.9",