Convert specs to RSpec 3.0.2 syntax with Transpec

This conversion is done by Transpec 2.3.1 with the following command:
    transpec -f

* 1 conversion
    from: be_false
      to: be_falsey

* 1 conversion
    from: be_true
      to: be_truthy

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Update Travis gems
Merge pull request #7 from petergoldstein/feature/rspec_3

RSpec 3 compatibility