create empty stats for new bundles

Author: shawnbot

script/bundle-size-report

@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 const fetch = require('node-fetch')
 const filesize = require('filesize')
+const cssstats = require('cssstats')
 const minimist = require('minimist')
 const {green, gray, yellow, red} = require('colorette')
 const {table, getBorderCharacters} = require('table')
@@ -50,8 +51,8 @@ Promise.all(
     return fetch(unpkgBaseURL + bundle.stats)
       .then(res => res.json())
       .catch(error => {
-        console.warn(`Unable to fetch old ${bundle.name} bundle from unpkg; assuming it's new!`)
-        return entry.local
+        console.warn(`Unable to fetch old "${bundle.name}" stats from unpkg; assuming it's new!`)
+        return cssstats('')
       })
       .then(stats => (entry.remote = stats))
       .then(() => entry)