Bug#953424: ITP: golang-gopkg-yaml.v3 -- YAML support for the Go language

[Daniel Swarbrick <daniel.swarbrick@cloud.ionos.com>]

Package: wnpp
Severity: wishlist
Owner: Daniel Swarbrick <daniel.swarbrick@cloud.ionos.com>

* Package name    : golang-gopkg-yaml.v3
  Version         : 3.0.0
  Upstream Author : Canonical Ltd
* URL             : https://gopkg.in/yaml.v3
* License         : Apache-2.0
  Programming Lang: Go
  Description     : YAML support for the Go language

The yaml package enables Go programs to very comfortably encode and decode YAML
values. It was developed within Canonical as part of the juju project, and is
based on a pure Go port of the well-known libyaml C library to parse and
generate YAML data quickly and reliably.
.
The yaml package supports most of YAML 1.2, but preserves some behavior from
1.1 for backwards compatibility.
.
Specifically, as of v3 of the yaml package:
.
 * YAML 1.1 bools (yes/no, on/off) are supported as long as they are being
   decoded into a typed bool value. Otherwise they behave as a string.
   Booleans in YAML 1.2 are true/false only.
 * Octals encode and decode as 0777 per YAML 1.1, rather than 0o777 as
   specified in YAML 1.2, because most parsers still use the old format.
   Octals in the 0o777 format are supported though, so new files work.
 * Does not support base-60 floats. These are gone from YAML 1.2, and were
   actually never supported by this package as it's clearly a poor choice.
.
and offers backwards compatibility with YAML 1.1 in some cases. 1.2, including
support for anchors, tags, map merging, etc. Multi-document unmarshalling is
not yet implemented, and base-60 floats from YAML 1.1 are purposefully not
supported since they're a poor design and are gone in YAML 1.2.

The yaml.v3 package introduces some new API methods not present in
yaml.v2, and as v3 is increasingly being used by Go applications (in
particular, Prometheus-related packages), it's a good time to package it for
Debian.

I will co-maintain this package along with the Debian Go Packaging Team.
My colleage, Benjamin Drung, has kindly offered to sponsor this package
while I am waiting for my DD application to be processed.