There have been a few discussions about problems with bundling react 15 and react 16 side by side (#101 #105). Since react-dom-core seems to only be used for creating look-up tables for html attributes, and since react15 hasn't seen an update in two years, would it make sense to extract these lookups into html-react-parser and drop the react-dom-core dependency?

This may require dropping support for react 15 so I understand if this is not a good direction.