fix alter migration to work with schema: false
fix alter migration to work with schema: false

dmarcelino/waterline,jonniedeb/waterline,tjwebb/waterline,waterlinejs/waterline,citizenken/waterline,mmiller42/waterline,contra/waterline,scippio/waterline,listepo/waterline,particlebanana/waterline,balderdashy/waterline,hippich/waterline,kriswill/waterline,antoniopol06/waterline,jianpingw/waterline,ctartist621/waterline,3032441712/waterline,Atlantis-Software/waterline,Atlantis-Software/offshore,Zaggen/waterline,mcanthony/waterline,luislobo/waterline,atiertant/offshore,metidia/waterline,moklick/waterline,AlexisNo/waterline