cli,outdated: default homepage to an empty string (#124)

PR-URL: #124
Credit: @anchnk 
Reviewed-By: @aeschright

Author: anchnk

Diff for: lib/outdated.js

@@ -143,7 +143,7 @@ function makePretty (p, opts) {
   var latest = p[4]
   var type = p[6]
   var deppath = p[7]
-  var homepage = p[0].package.homepage
+  var homepage = p[0].package.homepage || ''
 
   var columns = [ depname,
     has || 'MISSING',