Miniflare multi-item get returns get order but production returns lexigrophical

[vlovich]

Durable Objects multi-item get returns in ascending lexicographical key order. However, Miniflare returns a Map in requested key order.

In other words:

const items = await storage.get(['c', 'b', 'a'])
console.error(JSON.stringify(Array.from(items.keys())))

will log different information between Miniflare and production.