Slightly improved tests for loadRange method

[bijela-gora]

This PR is more a question then a suggestion.

The question: should we care about an order in which StorageAdapterInterface.loadRange returns data?

When I utilized expect.arrayContaining in this commit bijela-gora@3238d7a to automerge-repo I'm sure I didn't consider that. Now, I'm not even sure why I used that asymmetric matcher. The expect.arrayContaining does not care about an order of elements inside arrays:

describe('expect.arrayContaining', () => {
	it("doesn't care about order", () => {
		expect([0, 1, 2]).toEqual(expect.arrayContaining([2, 0]))
	})
})

I noticed that a day ago when I was trying to make a storage adapter based on node:sqlite. For some reasons better-sqlite3 and node:sqlite for the same SQL statement returns results ordered differently. I tested that with latest version of better-sqlite3 and with latest Node.js because latest versions uses the same SQLite version