As some of you may notice, this version is quite historical, as it's the first time in history we actually incremented the middle digit! :) The two key reasons for this unprecedented change were the new input interface, and the broken binary compatibility of modules due to the versioning support.
正如您所注意到的，这个版本真正具有历史意义，因为以往以来，我们还是第一次往中间版号增加了数字！此空前变化的两个关键原因是：新的输入界面；由于版本支持所带来的非连续版本模块的兼容性。
Versioning support for extensions.
扩展模块的版本支持。
