Add test for unnormalizedFlags with aliases

[tommy-mitchell]

Adds a test case to make sure that cli.unnormalizedFlags works correctly with the new aliases option:

test('aliases - unnormalized flags', t => {
	t.deepEqual(meow({
		importMeta,
		argv: ['--foo=baz'],
		flags: {
			fooBar: {
				type: 'string',
				aliases: ['foo'],
				shortFlag: 'f',
			},
		},
	}).unnormalizedFlags, {
		fooBar: 'baz',
		foo: 'baz',
		f: 'baz',
	});
});