Bumped sbt-pgp version to 0.8.
Bumped sbt-pgp version to 0.8.

milessabin/shapeless,TomasMikula/shapeless,roberth/shapeless,isaka/shapeless,triggerNZ/shapeless,malcolmgreaves/shapeless,liff/shapeless,tek/shapeless,fthomas/shapeless,notxcain/shapeless,clhodapp/shapeless,wheaties/shapeless,lambdista/shapeless,lukasz-golebiewski/shapeless,alexarchambault/shapeless,joescii/shapeless,khronnuz/shapeless,Atry/shapeless