support namespaced rules

[Mouvedia]

Which issue, if any, is this issue related to?

Closes #438

Is there anything in the PR that needs further explanation?

https://github.com/sindresorhus/scoped-regex/blob/6b4b9ac4fe20cebd0c343a7b2f88c9ce09b6ca22/index.js#L1

[netlify[bot]]

✅ Deploy Preview for chimerical-trifle-8d3c21 ready!

Name	Link
🔨 Latest commit	b0ec904d35d714dbf5014cd71baafabe3df483f6
🔍 Latest deploy log	https://app.netlify.com/sites/chimerical-trifle-8d3c21/deploys/674001bd3bf90800086dcfb6
😎 Deploy Preview	https://deploy-preview-439--chimerical-trifle-8d3c21.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.