v0.3.3

WIP: handle error on SET

v0.3.2

WIP: add cache options

v0.3.1

FIX: SCAN got overlapping value

v0.3

WIP: revise SHUTDOWN

v0.2.1

FIX: strange overlapping value on SCAN

v0.2

WIP: impl parse argument -config

v0.1

FIX: nil pointer when ErrKeyNotFound & rename var