Drop-in replacement for LS

[bisubus]

The suggestion is to allow the library to be used as a drop-in replacement for LS. Currently method names are mismatched, some members don't exist, see https://developer.mozilla.org/en-US/docs/Web/API/Storage#properties

Aliases:

• getItem()
• setItem()
• removeItem()

Missing members:

• valueOf() (not documented but implemented on localStorage)
• key()
• length

[niketpathak]

Thank you for your valuable suggestion. Will surely consider it for the future release.
Thanks again!