Edge DNS by Akamai

**What provider would you like to see added to NPM?**
Edge DNS by Akamai:  https://learn.akamai.com/en-us/products/cloud_security/edge_dns.html

**Have you checked if a certbot plugin exists?**
Jup, there's one available: https://github.com/akamai/certbot-plugin-edgedns/

Would be great to have that available too.