XTC requires json >= 1.8.1

I have had XTC fails because the correct json version was not
available. Specifically, if json 1.7.1 is sent to the XTC.
Edn dependency should be flexible

Yeah, they pushed a bad commit.  But if we pin to a particular
we'll just have a harder time changing this dependency later.
s Please enter the commit message for your changes. Lines starting
Slowhand dep should be ~>
Awesome-print dep should be ~>
Bundler dep should match xamarin-test-cloud-command-line

The XTC cli requirement is >= 1.3.1, < 2.0 so calabash should at
least match that.  I think, however, we could drop this dependency.
Bump version in response to gemspec changes
Merge pull request #484 from calabash/feature/gemspec-dependencies-should-use-pessimistic-operator

Feature/gemspec dependencies should use pessimistic operator