update release version to v0.3.0
update release version to v0.3.0

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