getReorderPatch support patch of array

[dzyhenry]

When I change the 'keys' test case as follows, the 'getReorderPatch' function doesn't work, because the patch returned from 'diff' is an Array.

test("keys get reordered", function (assert) {
    var leftNode = h("div", [
        h("div"),
        h("div", { key: 1 }),
        h("div"),
        h("div", { key: 2 }),
    ])
    var rightNode = h("div", [
        h("div", { key: 1 }),
        h("div"),
        h("div", { key: 3 }),
        h("div"),
    ]);
    var rootNode = render(leftNode)

    var patches = diff(leftNode, rightNode)
    assert.equal(patchCount(patches), 2)
    assertReorderEquals(assert, patches, {
        removes: [
            {from: 1, key: '1' },
            {from: 2, key: null },
            {from: 2, key: '3' },
        ],
        inserts: [
            {to: 0, key: '1' },
            {to: 2, key: '3' },
        ]
    })
})