.gitignore in ruby-kafka-0.4.2 vs .gitignore in ruby-kafka-0.4.3

@@ -1,9 +1,10 @@
 /.bundle/
 /.yardoc
 /_yardoc/
 /coverage/
 /doc/
+/Gemfile.lock
 /pkg/
 /spec/reports/
 /tmp/
 .env
 *.log