Updated version to 1.0.25

[jerry-jeon]

• Incorrectly required fields in PUT /open_channels/{channel_url}
  • Made all options except channel_url as optional
• Required fields in PUT /users/{user_id}
  • Made nickname and profile_url optional
• GET /group_channels/{channel_url}/messages/unread_count
  • Added support for multiple user_ids in the query parameters.
• Removed the redundant property isFrozen in GroupChannel, Open Channel
  • Use freeze instead.
• DELETE /users/{user_id}/push/{token_type}/{token}
  • Fixed the incorrect response type: token is now a string, not an array of strings.
• GET /{channel_type}/{channel_url}/messages
  • Fixed the issue with og:image missing the "type" field