skinny-widgets button element for antd theme
button element
```
npm i sk-button sk-button-antd --save
then add the following to your html
`html``
base-path="/node_modules/sk-core/src"
theme-path="/node_modules/sk-theme-antd"
>
#### slots
default (not specified) - contents inside button
label - the same as label
#### template
id: SkButtonTpl