security/py-certbot: Update to 0.22.2.

0.22.2
- A type error introduced in 0.22.1 that would occur during challenge
  cleanup when a Certbot plugin raises an exception while trying to
  complete the challenge was fixed.

0.22.1
- The ACME server used with Certbot's --dry-run and --staging flags is
  now Let's Encrypt's ACMEv2 staging server which allows people to
  also test ACMEv2 features with these flags.
- The HTTP Content-Type header is now set to the correct value during
  certificate revocation with new versions of the ACME protocol.
- When using Certbot with Let's Encrypt's ACMEv2 server, it would add
  a blank line to the top of chain.pem and between the certificates in
  fullchain.pem for each lineage. These blank lines have been removed.
- Resolved a bug that caused Certbot's --allow-subset-of-names flag
  not to work.
- Fixed a regression in acme.client.Client that caused the class to
  not work when it was initialized without a ClientNetwork which is
  done by some of the other projects using our ACME library.


(fhajny)