Allow passing new props to updateInitialDimension

[codeheroics]

When componentWillReceiveProps happens it callsupdateInitialDimension to get new dimensions.

However, to calculate these new dimensions, updateInitialDimension calls getTopPosition and getBottomBoundary, which both read information from the old props.

This PR allows an optional object to be passed to updateInitialDimension so the new props values can be given to the other functions.

[coveralls]

Coverage increased (+0.02%) to 97.253% when pulling ffdd783 on codeheroics:pass-new-props-to-updateInitialDimension into ac2df57 on yahoo:master.

[yahoocla]

Thank you for submitting this pull request, however I do not see a valid CLA on file for you. Before we can merge this request please visit https://yahoocla.herokuapp.com/ and agree to the terms. Thanks! 😄

[yahoocla]

CLA is valid!

[hankhsiao]

So you really have a use case that you will dynamically change Sticky props? Can you elaborate your case, so I can have broader view to check all logic.

[codeheroics]

Yes, I've got the problem with an infinite scroll.

When scrolling down, I need to set a bottomBoundary to the current position of a footer element. When scrolling, if bottomBoundary isn't updated fast enough (eg. when I give new props to react-stickynode, which causes it to recalculate its dimensions with the previous props), my sticky sidebar ends up scrolling up, since these dimensions weren't correctly updated. Then, when the dimensions are finally correctly updated, the sidebar jumps back to its position at the bottom of the page, leading to a quite displeasant effect.

[hankhsiao]

Sorry for the late response. It looks good 👍

[kaesonho]

👍