Missing "Revert Change DisplayName" endpoint

[Foorack]

• PUT /users/{yourID}

Blocked (kinda) by #65

{
	"revertDisplayName": true,
	"currentPassword": "password"
}

apiKey and auth required

With password:

Success returns CurrentUser

pastDisplayName is:

 "pastDisplayNames": [
    {
      "displayName": "UsernameNew",
      "updated_at": "2021-09-27T18:03:23.483Z",
      "reverted": true
    },
    {
      "displayName": "UsernameOriginal",
      "updated_at": "2021-09-27T18:01:48.372Z"
    }
  ],

[jellejurre]

Fixed in #463