.gitignore in postgres_ext-2.2.0 vs .gitignore in postgres_ext-2.3.0

@@ -16,7 +16,10 @@
 test/tmp
 test/version_tmp
 tmp
 bin/
 .rbenv-version*
+.ruby-version
+.ruby-gemset
+gemfiles/*.lock
 
 spec/dummy/config/database.yml