Feature request / suggest: detect when message is pinned / unpinned

[holtkamp]

Telegram supports "pinned messages"

Currently it seems not possible to detect when an incoming message is caused by a user (un)pinning a message.

It would be nice if an updatePinnedMessages or updatePinnedChannelMessages update message could be "detected", so one knows that no response is required, or a response like: "Thanks for (un)pinning a message" could be given...