Add a License file

[HowardZHY]

[djhbznz]

作者不像是还想做这个插件的样子

[djhbznz]

你是要续作？？？？

[MineTheCube]

i've added a license, so you guys can takeover and make your own :)

also, the only thing to do to make it work on recent version is to fill the versions section of your config: https://github.com/MineTheCube/ClientStats/blob/master/src/main/resources/config.yml#L69

you can get those here: https://github.com/PrismarineJS/minecraft-data/blob/master/data/pc/common/protocolVersions.json#L3-L4