* pkg(nuxt-start): add node-fetch, unfetch
* pkg(vue-app): add node-fetch, unfetch
* add yarn.lock
* feat(config): _app.fetch options
* feat(builder): add fetch to templateVars
* feat(vue-app): polyfill global with fetch
* feat(fixtures/basic): /api/test
* add fetch example to fixtures
* remove unfetch from nuxt-start
* update template snapshot
* revert extra new line in server.js
* single line if