NewBig5toUTF-8 cause error

[ac9607]

Error log

./bin/big5-to-utf8 /Users/wangyp/Documents/cultivate/data20180831
5: from ./bin/big5-to-utf8:5:in <main>' 4: from /Users/wangyp/Documents/cultivate/lib/cultivate.rb:11:in traverse'
3: from /Users/wangyp/Documents/cultivate/lib/cultivate.rb:11:in each' 2: from /Users/wangyp/Documents/cultivate/lib/cultivate.rb:15:in block in traverse'
1: from /Users/wangyp/Documents/cultivate/lib/cultivate.rb:15:in each' ./bin/big5-to-utf8:8:in block in

': undefined method `encode' for 27339:Integer (NoMethodError)

[Lin Jen-Shin (godfat)]

Fixed my stupid typo :/