[patch] adjusting go version to 1.22 to follow EOL Support https://en…

…doflife.date/go (#14)

[patch] initiate update for keys which are expired when servestale is…

… enabled

[minor] added panic recovery (#12)

[-] added tests to cover more scenarios
[-] updated README

[patch] exported Payload field (#11)

[-] if Payload's fields are not exported, then implementing an external store would be impossible
    as it cannot be serialized/deserialized with unexported fields.

[patch] added methods to Payload to make the underlying values availa…

…ble in custom store implementation (#10)

[-] defining extendable types in a single place with comments

[patch] export updater & store types

[patch] delete update inprogress key even if update fails
[patch] assign the err watcher from config to cache
[patch] added tests to cover more scenarios, debounce, err watcher

[patch] delete update inprogress key even if update fails

[patch] assign the err watcher from config to cache
[patch] added tests to cover more scenarios, debounce, err watcher
[-] updated README

[-] fixed typo in package name

[minor] The underlying storage is now customizable

[-] Renamed package to pocache
[-] Updated README for clarity and more information

[minor] first release of incache with minimal features