./node_modules/.bin/vue-cli-service lint --fix seems to work
./node_modules/.bin/vue-cli-service lint --fix
Try with npm run lint -- --fix
npm run lint -- --fix
Just found this one, seems to work, autofixing as you go. Add to your vue.config.js
chainWebpack: config => { config.module.rule('eslint').use('eslint-loader').options({ fix: true }) }