Relax `Monad` constraint to `Applicative`
Relax `Monad` constraint to `Applicative`

ChristopherDavenport/http4s,http4s/http4s,rossabaker/http4s,aeons/http4s,ChristopherDavenport/http4s,ChristopherDavenport/http4s,rossabaker/http4s,aeons/http4s,aeons/http4s