fix(checkbox): Added box-sizing to component
fix(checkbox): Added box-sizing to component

consider adding the default value of box-sizing to the element
most websites today are using a variation of the global `box-sizing: border-box` https://css-tricks.com/box-sizing/
checkbox fails to work if the page box-sizing is set to `border-box`, adding `content-box` ensure that the element will be rendered as intended regardless of the page global box-sizing value

material-components/material-components-web,material-components/material-components-web,pgbross/material-components-web,anton-kachurin/material-components-web,Yizhachok/material-components-web,Yizhachok/material-components-web,pgbross/material-components-web,material-components/material-components-web,anton-kachurin/material-components-web