Rename licence to license

Author: sharkykh

LICENCE renamed to LICENSE

@@ -9,6 +9,6 @@
 
 - [component-not-registered](src/component-not-registered.js) - Warn if a component is used in a [SFC file](https://vuejs.org/v2/guide/single-file-components.html) without being registered (a.k.a. a globally registered component). **Does not support dynamically assigned components.**
 
-## :lock: License
+## License
 
 See the [LICENSE](LICENSE) file for license rights and limitations (MIT).