Translate Hash#reject regression in 2.1.1 news (zh_tw).
Update Hash#reject regression in 2.1.1 is released post (zh_tw).
Merge pull request #671 from JuanitoFatas/regression-news-zh_tw

Translate Hash#reject regression in 2.1.1 news (zh_tw).
Add the French translation of the news about the regression of Hash#reject.