latest release does not include commits made prior to release (typing indicator support)

@mpociot @crynobone Any chance you could tag a new release?

I've noticed that the latest release 1.5.1, even though it was tagged on March 27th 2018, does not actually include the commits you made on March 13th which added support for the typing indicator

There are also a few more commits made since 1.5.1 so I think it would be nice to have a fresh 2020 release : )

I'm not sure how this happened, but I need to use the typing indicator now and would prefer not having to use the dev-master.

*In any case it's not possible to use the dev-master because it refers to a `^3.0` version of `botman/botman`, which as far as I can see does not exist.. so could you please revert that to `^2.0`*

Many thanks!!