Take into account a CollectionPage decoded as array

[j3j5]

When trying this library, I was trying to create a custom type for Mastodon following the docs. I've added my own type to support Note objects adding the missing properties but when I try to create a Note object with with of my own posts, I get the follwing TypeError:

 TypeError  property_exists(): Argument #1 ($object_or_class) must be of type object|string, array given.
--
0:  () at vendor/landrok/activitypub/src/ActivityPhp/Type/Util.php:201
1:  property_exists() at vendor/landrok/activitypub/src/ActivityPhp/Type/Util.php:201
2:  ActivityPhp\Type\Util::hasProperties() at vendor/landrok/activitypub/src/ActivityPhp/Type/Util.php:506

After some debugging I realized that when validating a CollectionPage, first it validates that is a valid Collection, which has a check in case the $item is not an array, so it'll convert it to object, and then, check that the $item has the typeOf property, but then is not doing the array-object conversion, hence the error.

This patch fixes that.

Here's the json file that produces the error. Fails when validating the first key. It's a json retrieved from Mastodon v4.0.2.

{
    "@context": [
        "https://www.w3.org/ns/activitystreams",
        {
            "ostatus": "http://ostatus.org#",
            "atomUri": "ostatus:atomUri",
            "inReplyToAtomUri": "ostatus:inReplyToAtomUri",
            "conversation": "ostatus:conversation",
            "sensitive": "as:sensitive",
            "toot": "http://joinmastodon.org/ns#",
            "votersCount": "toot:votersCount",
            "Hashtag": "as:Hashtag"
        }
    ],
    "id": "https://hachyderm.io/users/j3j5/statuses/109321328485360034",
    "type": "Note",
    "summary": null,
    "inReplyTo": null,
    "published": "2022-11-10T20:11:31Z",
    "url": "https://hachyderm.io/@j3j5/109321328485360034",
    "attributedTo": "https://hachyderm.io/users/j3j5",
    "to": [
        "https://www.w3.org/ns/activitystreams#Public"
    ],
    "cc": [
        "https://hachyderm.io/users/j3j5/followers"
    ],
    "sensitive": false,
    "atomUri": "https://hachyderm.io/users/j3j5/statuses/109321328485360034",
    "inReplyToAtomUri": null,
    "conversation": "tag:hachyderm.io,2022-11-10:objectId=1050302:objectType=Conversation",
    "content": "\u003cp\u003eI\u0026#39;m buzzing with ideas on how to bring all my \u003ca href=\"https://hachyderm.io/tags/GoodBots\" class=\"mention hashtag\" rel=\"tag\"\u003e#\u003cspan\u003eGoodBots\u003c/span\u003e\u003c/a\u003e into the fediverse but this week I don\u0026#39;t have energy at the end of the day to implement any of them. Luckily the weekend is close 🙏 \u003ca href=\"https://hachyderm.io/tags/StayTuned\" class=\"mention hashtag\" rel=\"tag\"\u003e#\u003cspan\u003eStayTuned\u003c/span\u003e\u003c/a\u003e\u003c/p\u003e",
    "contentMap": {
        "en": "\u003cp\u003eI\u0026#39;m buzzing with ideas on how to bring all my \u003ca href=\"https://hachyderm.io/tags/GoodBots\" class=\"mention hashtag\" rel=\"tag\"\u003e#\u003cspan\u003eGoodBots\u003c/span\u003e\u003c/a\u003e into the fediverse but this week I don\u0026#39;t have energy at the end of the day to implement any of them. Luckily the weekend is close 🙏 \u003ca href=\"https://hachyderm.io/tags/StayTuned\" class=\"mention hashtag\" rel=\"tag\"\u003e#\u003cspan\u003eStayTuned\u003c/span\u003e\u003c/a\u003e\u003c/p\u003e"
    },
    "attachment": [],
    "tag": [
        {
            "type": "Hashtag",
            "href": "https://hachyderm.io/tags/GoodBots",
            "name": "#GoodBots"
        },
        {
            "type": "Hashtag",
            "href": "https://hachyderm.io/tags/staytuned",
            "name": "#staytuned"
        }
    ],
    "replies": {
        "id": "https://hachyderm.io/users/j3j5/statuses/109321328485360034/replies",
        "type": "Collection",
        "first": {
            "type": "CollectionPage",
            "next": "https://hachyderm.io/users/j3j5/statuses/109321328485360034/replies?min_id=109321387340611540\u0026page=true",
            "partOf": "https://hachyderm.io/users/j3j5/statuses/109321328485360034/replies",
            "items": [
                "https://hachyderm.io/users/j3j5/statuses/109321387340611540"
            ]
        }
    }
}