Versioning

[armanbilge]

sbt-typelevel wants our versioning to be consistent with tags. The tags from the Twitter fork put us roundabout 1.0.2. Since we can assume there will be no future releases from them, we could just pick up from there.

Or, I suppose we can strip the tags from our fork and start at 0.1.0?

[armanbilge]

Eh, I don't like messing with git history and this is all private[http4s] anyway. Fine to pick up from 1.0.3 imo.