Fix typo in History.md
Fix typo in History.md

* '3.0.0 / 2013-12-19' is shown twice.

cgvarela/co,f0rmat1k/co,tj/co,VasylHryha/co,abbshr/co,gyson/co,luxe-eng/valet-express.co,seegno-forks/co,guangfu/co,Jonekee/co,TakayukiSakai/co,pjeby/co3-devsuite,hoozi/co,gradecam/co