Rüsh release

This PR makes the library compatible with the Rüsh Release (#9) convention Hoa now adopts.

We have two commits here:

* The first one to lock on Hoa `~1.0`
* The second one to lock on Hoa `~2.0`

Once this gets merged, we'll have to put 2 tags on the repository:

* on 757775a the tag will be `1.14.09.18`
* on 11d2506 the tag will be `2.14.09.18`

ping @Hywan, @stephpy, @shouze and every @hoaproject/hoackers having anything to say :)