Release 1.0 version

[rvanlaak]

This bundle seems to be stable enough, is it time to release v1.0.0? This would help with regards to composer minimum stablility, everything below v1 is seen as unstable.

[emiliomg]

👍

[curry684]

It seems the maintainer dropped all work on Slack projects in May 2016. Should these projects be considered abandoned?

[emiliomg]

Probably