.gitignore in slackdo-0.3.9 vs .gitignore in slackdo-0.4.0

@@ -4,9 +4,10 @@
 /coverage/
 /doc/
 /pkg/
 /spec/reports/
 /tmp/
+/vendor/
 
 # rspec failure tracking
 .rspec_status
 
 .DS_Store