Filter "answered" discussions by default

[kingdonb]

And sort by default based on stale-age

[kingdonb]

Sorting is solved in #15

• Bug Scrub 0015 #15

There was an error due to the wrong update date being chosen in our GraphQL query (I was using last_edited_at instead of updated_at)

Discussions are now sorted as they should be. (TODO: Answered discussions are still included in the list by default. They should be filtered, but it should remain accessible somehow.)

We also discovered that labels are possible to use but less than optimal: you can filter by label at the entrypoint.

[kingdonb]

Ref: labels, see f7f9c57 (branch: good first issue)