Update rspec to v2.14
Merge pull request #12 from joker1007/update_rspec

Update rspec to v2.14
Torelate rspec 2.13

It is not good choice to break backward compatibility of dependency here.
The implementation works both in 2.13 and 2.14.
Version 0.0.9

Changes:

- Fix problem with RSpec 2.14 (@joker1007).
Clear "already initialized constant Regexp::ENC_XXX" warnings.

Requiring ruby2ruby emits these warnings. But they disappear
by requiring it after sourcify.
Merge pull request #13 from saturday06/clear_warnings

Clear "already initialized constant Regexp::ENC_XXX" warnings.