Hotfix to set ruby version for pachager

This release includes security fixes for the following vulnerabilities:

* CVE-2014-8080: Denial of Service XML Expansion
* Changed default settings of ext/openssl related to CVE-2014-3566

And there are some bug-fixes.

See [news on ruby-lang.org](https://www.ruby-lang.org/en/news/2014/10/27/ruby-2-1-4-released/)