It turns out that in Masto v2.3.0 the languages key was added to the V1
Instance and that it's effectively mandatory. Though in GtS we don't
really have this concept yet, some apps will explode if the languages
key is missing altogether. So at least return the empty array on V1 too
in the hopes that it makes things work well enough.
For history's sake, you can see the attributes that will get serialised
in
f877aa9d70/app/serializers/rest/v1/instance_serializer.rb (L6-L9).
Because the attribute does not have a conditional defined for it,
there isn't a filter that optionally omits it, or a def languages to
modify the behaviour the attribute is effectively always included and
serialised.
Fixes: #1662
* [chore] Remove years from all license headers
Years or year ranges aren't required in license headers. Many projects
have removed them in recent years and it avoids a bit of yearly toil.
In many cases our copyright claim was also a bit dodgy since we added
the 2021-2023 header to files created after 2021 but you can't claim
copyright into the past that way.
* [chore] Add license header check
This ensures a license header is always added to any new file. This
avoids maintainers/reviewers needing to remember to check for and ask
for it in case a contribution doesn't include it.
* [chore] Add missing license headers
* [chore] Further updates to license header
* Use the more common // indentend comment format
* Remove the hack we had for the linter now that we use the // format
* Add SPDX license identifier
