update release version to v0.8.0
update release version to v0.8.0

jszroberto/spruce,HeavyWombat/spruce,geofffranks/spruce,thomasmmitchell/spruce,geofffranks/spruce,thomasmmitchell/spruce,jszroberto/spruce,HeavyWombat/spruce,thomasmmitchell/spruce,jszroberto/spruce,HeavyWombat/spruce,geofffranks/spruce