Returns not found when key exists but is expired

[mhubbard]

https://github.com/patrickmn/go-cache/blob/a3647f8e31d79543b2d0f0ae2fe5c379d72cedc0/cache.go#L131

Looks like you return nil, false when the key was actually found but has expired.

[patrickmn]

Expired items are treated as if they don't exist, so this is the intended behavior.