Array type does not obey OPTS_END

[jquick]

Using the typical OPTS_END "--" after an array option type will not work as expected. Ex:

my_command --array 1 2 -- arg1 arg2

Updating https://github.com/erikhuda/thor/blob/master/lib/thor/parser/arguments.rb#L118 with:

    def parse_array(name)
      return shift if peek.is_a?(Array)
      array = []
      while current_is_value?
        break unless @parsing_options
        array << shift
      end

      array
    end

fixes this issue as the peek will set @parsing_options to false when it hits the OPTS_END