The dependency took a long time to compile, and was causing problems for
a user who was attempting to build the project.
Since it wasn't a strictly necessary dependency, and `jason` was already
included in the project, all instances of `poison` have been replaced
with `jason`.
The only additional code that this introduced was converting from
generic maps returned by `Jason.decode` into Service structs.
The latest CI update removed all invidious instances. Need to update CI
to skip applying an update for a particular service if there is an error
when fetching.
This adds a straightforward way of preserving Farside's redirecting
behavior in the user's browser history. That way if an instance becomes
unavailable between the 5 min scans, the user can opt to navigate back
one page and be taken to a new instance.
This is accomplished using a single line of JS, and could potentially
work as the default behavior of Farside (with the current default
behavior requiring a path prefix instead). This should be revisited down
the road when more people are using this service.
Since the current testing suite assumes more than one instance per
service, imgin causes the tests to fail, since there is only one
public instance.
Rather than refactor the tests to accommodate for services with only one
instance, imgin has been removed until there are multiple instances
available.
Rather than enforcing a 200 status code, the instance query is deemed a
success if the status code is <400. Various services return 200-399
status codes that don't necessarily indicate an error, but may have to
do with how the instance was configured.
