Attachment Support

[ryanvolum]

Right now this package doesn't implement all of the endpoints that the Bot Framework Connector does. Among the ones it ignores are the attachment ones. Being able to upload attachments to a bot is a necessary feature in many experiences.

Anyone want to take a stab at implementing those routes?

The open sourced Bot Framework Emulator has its own built in version of the connector, so you can use its implementation as inspiration:

Specifically, see the attachment controller for the emulator's implementation.