update service-runner to 0.2.8
update service-runner to 0.2.8

Needed to make https://github.com/wikimedia/service-runner/pull/54
available to aqs.

milimetric/restbase,wikimedia/restbase,milimetric/restbase,gwicke/restbase,wikimedia/hyperswitch,inverno/restbase,Pchelolo/restbase,cscott/restbase,cscott/restbase,eevans/restbase,wikimedia/mediawiki-services-restbase,d00rman/restbase,wikimedia/mediawiki-services-restbase,inverno/restbase,Pchelolo/restbase,eevans/restbase,gwicke/restbase,d00rman/restbase,wikimedia/restbase