TypeScript - Fix the cache type

[dylang]

@sindresorhus Thanks for adding types to your repos!

I believe the cache type needs to include the data, otherwise this isn't possible:

const cache = new QuickLRU<string, { data: Bundle }>({
    maxSize: BUNDLE_COUNT_TO_MEMORIZE
});

const loadJsonFileMemorized = mem(
    (filename: string) => loadJsonFile<Bundle>(filename),
    {
        cache
    }
);

// After modifying we want to update the cache directly to avoid another load.
cache.set(filename, { data: updatedBundle });

[BendingBender]

Why is maxAge optional? It is not being set conditionally in the code.

[dylang]

If you aren't using the maxAge option then this value is not necessary.

[BendingBender]

With this definition, you're basically saying that maxAge may be sometimes provided to the underlying API. This is, however, not the case. maxAge is always set, disregarding of whether you use it or not.

When you implement a custom cache storage you don't actually have to use the maxAge value, it is however, always there.

[dylang]

Okay, thanks for that explanation @BendingBender! Changing maxAge to required.