Ruby-SDK - 2.1.1

October 11th, 2018

### Bug Fixes
- fix(track): Send decisions for all experiments using an event when using track ([#120](https://github.com/optimizely/ruby-sdk/pull/120)).
- EventBuilder uses the same logger as Project ([#122](https://github.com/optimizely/ruby-sdk/pull/122)).
- Updating libraries for Ruby SDK ([#123](https://github.com/optimizely/ruby-sdk/pull/123)).
- fix(datafile-parsing): Prevent newer versions datafile ([#124](https://github.com/optimizely/ruby-sdk/pull/124)).

https://github.com/optimizely/ruby-sdk/releases/tag/v2.1.1