PermissionOverwrite.type is a number when a overwrite is deleted in the oldChannel from Client#channelUpdate

[Jarco-dev]

Please describe the problem you are having in as much detail as possible:
When deleting a permission ovewrrite from a channel the oldChannel keeps the permissionOverwrite type as a number (0 for role 1 for member)

Include a reproducible code sample here, if possible:

• Delete a permission overwrite to show the bug

client.on("channelUpdate", (oldChannel, newChannel) => {
    console.log(oldChannel.permissionOverwrites.cache.first()?.type, newChannel.permissionOverwrites.cache.first()?.type)
});

Further details:

• discord.js version: v13
• Node.js version: v14.16.0
• Operating system: Windows 10
• Priority this issue should have – please be realistic and elaborate if possible: medium

Relevant client options:

• partials: none

• gateway intents: GUILDS

• other: none

• I have also tested the issue on latest master, commit hash: discord.js@13.0.0-dev.d433fe8.1625961832