Added typings to get_store_value

[sphinxc0re]

I'm using the get method frequently to get authentication data from a svelte-store outside of svelte-components. To make that work within TypeScript files, I added typings.

[sphinxc0re]

I don't understand why the test is failing. Any clues?

[caroso1222]

Your PR is failing because there's a circular dependency. utils.ts requires store/index.ts. store/index.ts requires svelte/internal. svelte/internal contains utils.ts.

In other words:
utils.ts -> store/index.ts -> svelte/internal -> utils.ts -> store.index.ts -> ...

One way to go around this could be reordering the declarations within /store:

1. Move all the types and interfaces to a file store/types.ts
2. Move all the functions to store/functions.ts
3. Edit store/index.ts to preserve the same public API.

But... that'll make it a much bigger PR. You might want to open an issue for that to discuss, I think.

[benmccann]

Thanks for this! I'm going to close in favor of #5269 which gets the tests to pass