Replace our cookie-based cache with self-clearing browser.storage #2100

Cache where? Our cache is rather small and if we're gonna store them in a regular browser.storage.local we also need a cleaning mechanism so it doesn't stay there forever.

I think a simple LRU implementation on top of browser.storage.local with lazy saving/cleaning should suffice.

Originally posted by @dotconnor in https://github.com/sindresorhus/refined-github/pull/2026

Whatever the method used, it's important that unused items don't linger in the cache forever.