feat(follow): get license and author

Author: Realtin

lib/follow.js

@@ -66,7 +66,7 @@ async function handleChange ({ channel, client, registry }, change) {
 
   cleanDoc(change.doc)
   const distTags = _.get(change, 'doc.dist-tags')
-  const versions = _.mapValues(change.doc.versions, v => _.pick(v, ['gitHead', 'repository']))
+  const versions = _.mapValues(change.doc.versions, v => _.pick(v, ['gitHead', 'repository', 'license', '_npmUser']))
 
   const payload = {
     name: 'registry-change',