Added <Link scroll> PropType (#3003)
Added <Link scroll> PropType (#3003)

This should avoid the angry console warnings when trying to override the default scroll behavior using `<Link scroll={false}>`
azukaru/next.js,flybayer/next.js,JeromeFitz/next.js,azukaru/next.js,BlancheXu/test,zeit/next.js,flybayer/next.js,zeit/next.js,JeromeFitz/next.js,nelak/next.js,azukaru/next.js,azukaru/next.js,JeromeFitz/next.js,JeromeFitz/next.js,giacomorebonato/next.js,flybayer/next.js,BlancheXu/test,callumlocke/next.js,zeit/next.js,kpdecker/next.js,BlancheXu/test,flybayer/next.js