Bump rubocop

[vsppedro]

Hi, I hope you guys are doing well.

I saw the opportunity to update rubocop in this project. What do you think?

This all started when, after running rubocop, I received the following warnings:

Error: The `Layout/AlignHash` cop has been renamed to `Layout/HashAlignment`.
(obsolete configuration found in .rubocop.yml, please update it)
The `Lint/HandleExceptions` cop has been renamed to `Lint/SuppressedException`.
(obsolete configuration found in .rubocop.yml, please update it)

About this PR:

• Bumb Rubocop to 0.82
• Update ruby version to 2.4, Version 2.3 is no longer supported for this rubocop version. Just a suggestion.
• Fix rubocop warnings.

[ioquatix]

Thanks, I'll migrate this to use github actions on windows.