Fix RuboCop offenses

[utkarsh2102]

Hi @arnau 👋

As discussed in the previous PR, here are a bunch of fix, each in a separate and a meaningful commit! 🚀

In case you find them good, please don't squash them while merging (since each commit represents a different set of changes) 😄
(and this way, it's easier to troubleshoot/debug, if something goes wrong or need to be reverted!)

I hope this helps 💯
I'll keep doing these small fixes as and when I keep getting time!
Thanks for your awesome work ❤️

Signed-off-by: Utkarsh Gupta <utkarsh@debian.org>

[arnau]

Looks great 👌

Would you mind rebasing from master? I'll merge after that.

[utkarsh2102]

Would you mind rebasing from master?

Should be done! \o/

[arnau]

Given that these changes change the minimum Ruby version, I'm thinking in bumping to 0.13.0. Any thoughts?

Also, any other changes you think would be good to bring to the next version?

[utkarsh2102]

I was gonna suggest disabling CircleCI and enabling Travis (if that's disabled in favor of CircleCI?), but I think you already disabled CircleCI, right?

If not, can you do so!? I'd love to get the build green 🚀

[arnau]

Yes I disabled CircleCI yesterday. Should be Travis only now, although it just failed. 🤔

[utkarsh2102]

Before you bump the version, I have some more minor changes I want to bring.

1. Make the CI green.
2. Introduce a Rakefile --> run tests and rubocop on default. So that next set of PRs will run those tests and we'll know if something needs fixing, etc.
3. <some more minor edits, as we go!>

[utkarsh2102]

Yes I disabled CircleCI yesterday.

Perfect! 💯

Should be Travis only now, although it just failed. 🤔

That's weird. I don't see any CI running (or failing..)?
cf: https://github.com/arnau/ISO8601/commits/master

[arnau]

[!] There was an error parsing `Gemfile`:
[!] There was an error while loading `iso8601.gemspec`: cannot load such file -- /Users/arnau/kitchen/iso8601/iso8601/version
Does it try to require a relative path? That's been removed in Ruby 1.9. Bundler cannot continue.

 #  from /Users/arnau/kitchen/iso8601/iso8601.gemspec:3
 #  -------------------------------------------
 #
 >  require_relative 'iso8601/version'
 #
 #  -------------------------------------------
. Bundler cannot continue.

 #  from /Users/arnau/kitchen/iso8601/Gemfile:5
 #  -------------------------------------------
 #
 >  gemspec
 #  -------------------------------------------

https://travis-ci.org/github/arnau/ISO8601/jobs/704893061

[utkarsh2102]

Ah, got it!
That should be an easy fix 😅

I can do that in the next PR.

[arnau]

Thanks :)

[arnau]

It might be better to remove the version.rb file and just use a string in gemfile.

[utkarsh2102]

I think it's okay to use version.rb as well. That's mostly kind-of a default way now.
Even bundler does that when we create a new gem via bundle gem foo.

That said, it's totally up to you! 😄
I can fix this in any way you want (though I prefer having a version.rb 😅)

[arnau]

Ok, if it's the default way, happy to keep it :)