Upgrade specs2 to 3.8.4.1
Upgrade specs2 to 3.8.4.1

specs2-3.8.4-scalaz-7.1 depended on scalaz-7.2.  Oops.

aeons/http4s,reactormonk/http4s,aeons/http4s,ChristopherDavenport/http4s,reactormonk/http4s,ZizhengTai/http4s,ZizhengTai/http4s,rossabaker/http4s,m4dc4p/http4s,reactormonk/http4s,aeons/http4s,m4dc4p/http4s,ChristopherDavenport/http4s,m4dc4p/http4s,hvesalai/http4s,hvesalai/http4s,http4s/http4s,ChristopherDavenport/http4s,hvesalai/http4s,ZizhengTai/http4s,rossabaker/http4s