Certbot 1.20.0

Added

• Added --no-reuse-key. This remains the default behavior, but the flag may be
  useful to unset the --reuse-key option on existing certificates.

Changed

Fixed

• The certbot-dns-rfc2136 plugin in Certbot 1.19.0 inadvertently had an implicit
  dependency on dnspython>=2.0. This has been relaxed to dnspython>=1.15.0.

More details about these changes can be found on our GitHub repo.