Add missing require

k0kubun · k0kubun · commit f8461691c75e · 2021-01-07T22:32:48.000-08:00
This is useful if you want to use IRB::ColorPrinter as a library like:

```
begin
  require 'irb/color_printer'
  IRB::ColorPrinter.pp(obj)
rescue LoadError
  pp(obj)
end
```
diff --git a/lib/irb/color_printer.rb b/lib/irb/color_printer.rb
@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 require 'pp'
+require 'irb/color'
 
 module IRB
   class ColorPrinter < ::PP
