Update to RSpec 3

Fix for #266.
I think that would be a good idea.
On Jul 1, 2014 4:04 AM, "Matijs van Zuijlen" <notifications@github.com>
wrote:

> In spec/gem/updates_spec.rb:
>
> > @@ -11,14 +11,14 @@
> >      context 'version file' do
> >        it 'has been updated since the last release' do
> >          version_time = File.stat('lib/reek.rb').mtime
> > -        (version_time > @release_time).should be_true
> > +        expect(version_time > @release_time).to be_truthy
>
> I've taken a look at these tests, and they seem pretty useless to me,
> since:
>
>    - build/.last-release doesn't exist, so they're always skipped.
>    - The mtime of lib/reek.rb and History.txt changes all the time if you
>    switch branches.
>
> Shall we remove this entire test file?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/troessner/reek/pull/267/files#r14392620>.
>