Where is license file?

[k-fukuoka]

First, thank you for your great project, Our project use vue-the-mask.

We can't find a license file like Vue.js.
https://github.com/vuejs/vue/blob/dev/LICENSE

MIT License requires you to include a "copyright notice" and "license statement".

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

Couldn't you ask for the addition of a license file?