0.3.0

cache_origins is now cacheable_hosts, and takes bare hosts: "tiles.example.com" rather
than "https://tiles.example.com". The scheme was never carrying information — a worker
runs only on a secure page, and a secure page cannot fetch http — so it was a required
prefix with exactly one possible value. Requests are matched on a URL's host, so a port
belongs where it is not the default and localhost:3001 matches that port and no other.
A scheme raises at boot, naming what to write instead.
Full Changelog: 0.2.0...0.3.0