feat(useStorageValue): add custom parse and stringify functions to options

[dantman]

Overview

parse and stringify options have been added to useStorageValue to allow a custom parse and stringify to be used in place of the default JSON based parse/stringify.

Sometimes a custom format or a custom replacer function are needed for storing values in localstorage.

Checklist

• [x] Have you read contribution guideline?
• [x] Does the code have comments in hard-to-understand areas?
• [x] Is there an existing issue for this PR?
  • #942
• [x] Have the files been linted and formatted?
• [x] Have the docs been updated?
• [x] Have the tests been added to cover the changes?
• [x] Have you run the tests locally to confirm they pass?