Lock ruby version to 1.9.3.

[linjunpop]

Because of https://github.com/kandanapp/kandan-count/blob/master/kandan-count.gemspec#L16

Also, When I push to Heroku:

       Gem::InstallError: kandan-count requires Ruby version >= 1.9.3.
       An error occurred while installing kandan-count (1.1.0), and Bundler cannot continue.
       Make sure that `gem install kandan-count -v '1.1.0'` succeeds before bundling.
 !
 !     Failed to install gems via Bundler.
 !
 !     Heroku push rejected, failed to compile Ruby/rails app

[mjtko]

Does this mean we're dropping all requirements for Ruby 1.8.x syntax in the codebase, and can start using less hashrockets and more stabby lambdas etc?

[mjtko]

I ask cos I keep catching myself using the colon hash syntax rather than hashrockets, and I'm a bit fed up of it. 😉

[fusion94]

@mjtko AFAIK Kandan won't even run with less anything other than that 1.9 so we should probably plan on a massive refactoring

[mjtko]

Ok, thanks. I don't think supporting the current version (2.0.0) and the last major release (1.9.3) is anything other than what we should aim for anyway.

[fusion94]

Agreed, I've tested on 2.0 and until debugger gem supports it then we're stuck at 1.9

[mjtko]

Well, tbh, we could work around that (I have been, as it doesn't support the latest 1.9.3 either) - debugger isn't required in most cases and we should be able to run test/production without it for sure.

[gabceb]

I think we should work until debugger is out for 2.0. There is already a PR for it cldwalker/debugger#68