Fixed regression in migration function return value.
Fixed regression in migration function return value.

tgriesser/knex,Atlantis-Software/knex,tgriesser/knex,joeframbach/knex,tgriesser/knex,statyan/knex,whitelynx/knex,joeframbach/knex,CorvusCorrax/knex,WaltRock/knex,abegines/knex,Atlantis-Software/knex,maxcnunes/knex,joeframbach/knex,whitelynx/knex,maxcnunes/knex,harriha/knex,WaltRock/knex,carragom/knex,CorvusCorrax/knex,noodle/knex,statyan/knex,wubzz/knex,vellotis/knex,carragom/knex,harriha/knex,vellotis/knex,wubzz/knex,vellotis/knex,maxcnunes/knex,harriha/knex,whitelynx/knex,abegines/knex,noodle/knex