Scrabble Score case insensitive
Scrabble Score case insensitive

Use a uppercased word to test case insensitivity

fixes #272

exercism/xruby,remcopeereboom/xruby,Insti/exercism-ruby,Insti/xruby,tommyschaefer/xruby,tommyschaefer/xruby,NeimadTL/ruby,Insti/xruby,gchan/xruby,kotp/xruby,Insti/exercism-ruby,Insti/exercism-ruby,remcopeereboom/xruby,NeimadTL/ruby,gchan/xruby,NeimadTL/ruby,kotp/xruby,exercism/xruby