- Many text expects are now wrapped in setTimeout, as the fetch
promises settle async now.
- This makes the tests somewhat brittle, and we should maybe consider
reworking some of them. For example it is very hard to perform
a test like `expect(spy).to.have.not.been.called` in an async way.
(We could instead inspect the fakeServer requests() to know this.)
- Also includes some trickery for osm.js, which uses d3-xml (fetch)
now for unauthenticated calls and osmauth (xhr) for authenticated calls
* Takes data directly from the Wikibase data items (OSM Wiki)
https://wiki.openstreetmap.org/wiki/OpenStreetMap:Data_Items
* Understands the difference in regions - e.g. will show different
images depending on the local settings
* Perf: Single request will get both the tag and key description
