move requires out of global lib

[mroth]

Currently, in lib/lolcommits.rb, we require all external gems and libraries at the root level of the library:

require 'mini_magick'
require 'core_ext/mini_magick/utilities'
require 'fileutils'
require 'git'
require 'open3'
require 'methadone'
require 'date'
require 'mercurial-ruby'
require 'core_ext/mercurial-ruby/shell'

We should refactor to have only the files that actually use these gem deps require them, this is best practice for a project of this size, and will aide in future refactors because we can understand where our deps actually come from.

[matthutchinson]

Agree 👍 lib/lolcommits.rb should really only require the gems' local files in lib