add interfaces to internals
add interfaces to internals

vertiman/node-db-migrate,db-migrate/node-db-migrate,chatter/node-db-migrate,marbemac/node-db-migrate,ramakrishnan/node-db-migrate,andela-ooladayo/node-db-migrate,bwiggs/node-db-migrate,ror/node-db-migrate,cqricky/node-db-migrate,ViGo5190/node-db-migrate,SamuelBolduc/node-db-migrate,MForMarlon/node-db-migrate,db-migrate/node-db-migrate