2.0.1 / 2016-01-08
==================

  * use `ctx.state.i18n = i18n` instead of `Object.defineProperty(...')`

2.0.0 / 2016-01-08
==================

  * add `i18n` to `ctx.state`
  * change middleware signature for koa@2
  * refactor `I18n` Class with ES6 syntax