Update dom-helpers

[danez]

Currently uses the older version, which leads to dom-helpers being included twice, when bundling react-virtualized with webpack and having dom-helpers 2.x and 3.x used.

[bvaughn]

Hi @danez,

Thank you for creating this PR.

Jumping a dependency from 2.x to 3.x is a questionable change without a major release though, and I don't see a CHANGELOG for the dom-helpers lib unfortunately so I'm not sure if it would be safe enough to just relax the dependency to allow either 2.x or 3.x (eg "^2.4.0 || ^3.0.0")

@jquense would you have any suggestion by chance?

[jquense]

should be safe to upgrade. the "breaking" change in 2 -> 3 was around the import structure when importing all of dom-helpers, since RV just cherry-picks scrollbarSize , it shouldn't affect ya'll

[bvaughn]

Excellent. Thanks @jquense!

@danez let's go with a pattern that supports either version (eg "^2.4.0 || ^3.0.0") and leave it up to library users which they use. I don't want to yank the rug out from under anyone who may be relying on the 2.x import structure in their applications. It sounds like RV is safe to work with either though. 😁

[danez]

Okay updated :)

[bvaughn]

Fantastic. Thanks to both of your for your help with this. 😄

I'll try to get a release out sometime within the next day or two.