Update LocalStorageStore to lastest upstream release

[endigo9740]

The changelog is not super detailed but we want to maintain parity as possible.

Svelte Local Storage Store v0.3.2

These are the two projects in our project that will need to be updated:

• https://github.com/skeletonlabs/skeleton/blob/dev/src/lib/utilities/LocalStorageStore/LocalStorageStore.ts
• https://github.com/skeletonlabs/skeleton/blob/dev/src/lib/utilities/LocalStorageStore/LocalStorageStore.test.ts

These can be reference directly from the source

• https://github.com/joshnuss/svelte-local-storage-store/blob/master/index.ts
• https://github.com/joshnuss/svelte-local-storage-store/blob/master/test/localStorageStore.test.ts

Just note we call our core function localStorageStore instead of writable per Josh's original source. Also make sure to keep the attribution at the top of our script.

[endigo9740]

And just in case anyone asks, the original source is MIT licensed and we obtained direct permission from Josh to include this:
joshnuss/svelte-persisted-store#104