Fix crash in tab-completion with --noautocomplete

[tompng]

irb -r katakata_irb --noautocomplete
irb(main):001:0> 1.to_s[TAB][TAB]

#=> lib/katakata_irb/completor.rb:64:in `retrieve_completion_data': unknown keyword: :bind (ArgumentError)

Q. Why --noautocomplete is used with katakata_irb witch is a gem to provide powerful autocomplete?
A. Autocomplete is set to false by defualt in rails production