Fix proactive expiration delay in timing wheel (#65)

* fix timeing wheel expire delay bug

* fix test

Refactor Codebase (#62)

* fix os persist test not running

* use single struct option for NewStore method

* remove xxhash/v2 dependency from test

* minor refactoring

* minor comment update

* use mutex defer unlock in store

* fix lint

* fix lint

* fix test

* fix lint ci

* update ci

* minor refactoring

* update code comment

* replace temp pointer with value

* more comments

* update

* add zipf test to cache

* update cache zipf test

Fix weighted size not update when restore persistence (#56)

* fix weighted size not update when restore

* update test

update changelog

update ci

update readme

Builder strkey (#33)

* add StringKey method to builder

* add cache struct test

* add doc

add missing save/load methods to hybrid cache (#25)

Update README.md

add count to list, fix cm wrong capacity (#22)