Update herokuish to 0.3.0 release.
Update herokuish to 0.3.0 release.

progrium/buildstep,rvalyi/buildstep,progrium/buildstep,chourobin/buildstep,rvalyi/buildstep,chourobin/buildstep,rvalyi/buildstep,progrium/buildstep,rvalyi/buildstep,chourobin/buildstep,rvalyi/buildstep,progrium/buildstep,progrium/buildstep,rvalyi/buildstep,progrium/buildstep,chourobin/buildstep,chourobin/buildstep,chourobin/buildstep,chourobin/buildstep,rvalyi/buildstep,chourobin/buildstep,rvalyi/buildstep,progrium/buildstep,progrium/buildstep