Log Message:
Update to 6.12

Upstream changes:
6.12      2020-06-04 16:01:31Z
  - No changes since TRIAL release 6.11

6.11      2020-06-03 14:47:21Z (TRIAL RELEASE)
  - An IPv6 zone separator must be URI-quoted (GH#47) (Petr Pisar and Olaf
    Alders)

6.10      2020-05-26 16:20:36Z
  - No changes since TRIAL release 6.09

6.09      2020-05-25 16:52:14Z (TRIAL RELEASE)
  - Require IO::Socket::IP 0.25 so that HTTP::Tiny uses it (GH#45) (Shoichi Kaji)

6.08      2020-05-22 15:26:00Z (TRIAL RELEASE)
  - In t/chunked.t, leave choosing IP address family to IO::Socket::IP (GH#42) \ 
(Shoichi Kaji)
  - Add "IPv6 SUPPORT" section to pod (GH#43) (Shoichi Kaji)
  - Use HTTP::Tiny 0.042+ for IPv6 support (GH#41) (Shoichi Kaji)

6.07      2020-05-19 19:19:53Z (TRIAL RELEASE)
  - Prefer IP address for host in $d->url (GH#40) (Shoichi Kaji)
  - Improve documentation readability (GH#36) (Ferenc Erki)