Update to remove node-sass depenceny (#413)
Update to remove node-sass depenceny (#413)

PR 409 which bumps design system version from 3.0.0 to 3.0.1 added a dependency too node-sass by mistake.
node-sass again has dependency to node-gyp which has dependency to python, and causes all kinds of build errors when running npm install, unless the user has all the required build tools setup.
Altinn/DesignSystem,Altinn/DesignSystem