First Release of Forked Version

Changes:

• Updated the cloudflare provider to support Cloudflare's new API Token instead of using global API Key
• The following providers were removed:
  • DNSSimple
  • Azure DNS
• Replaced xenolf/lego go library with go-acme/lego v3, using version v3.1.0
• Migrated to go modules
• Built with alpine 3.12 as base environment

This is production ready as I already used this for months