Remove rubygems dependency.

[zw963]

Hi, I use this gem and rubocop, together with a portable version ruby. (traveling ruby)

this portable ruby is very simple, even it no rubygems, all see like work well, but
when i update rubocop and dependency, i have to change:

require 'rubygems/util'
require_relative 'constants'

module Unicode
  module DisplayWidth
    INDEX = Marshal.load(Gem::Util.gunzip(File.binread(INDEX_FILENAME)))
  end
end

To:

require_relative 'constants'

module Unicode
  module DisplayWidth
    INDEX = Marshal.load(File.binread(INDEX_FILENAME))
  end
end

And, unpack display_width.marshal.gz to display_width.marshal.
becuase in my portable ruby, no rubygems/util.

in my several gems (about 20+), this gem is the only gem which need rubygems,

I know rubygems is awesome, but, for portable ruby, it no use, I just need a $LOAD_PATH, it all work.

Thanks

[janlelis]

Thank you for the feedback!

I replaced the unzip functionality with a purely zlib based one on master! Can you please check if that works for you?

[zw963]

It is worked, Thanks!

[janlelis]

Awesome! It is now released with v1.3.3!