DNSroboCert 3.11.0

Added

• Add the reuse_key boolean parameter in certificate section: if true, the
  existing private key will be reused for the target certificate when renewed
• Add the "one-shot" mode: using the --one-shot flag, DNSroboCert will process
  only once the provided configuration, create/update/renew/delete certificates,
  then return immediately without setting up an automated renewal process or a
  configuration file watch

Modified

• Migrate the docker image from the Alpine base to the Debian base, in order
  to get better DNS support on Kubernetes, and benefit from pre-compiled wheels
  for cffi, lxml and cryptography
• Update Certbot to 1.18.0
• Update Lexicon to 3.7.0 (add oci and vercel providers)

Removed

• Drop Docker support on ppc64le architecture