I need to make webpack to merge equal modules by source code comparison.
For example I have ui-kit npm package that is used in page-a and page-b npm packages. I make change in "ui-kit" and bump its version in "page-a". Now "page-b" is using previous version of "ui-kit" and by that I am sure that I didn't break anything in this page. But because they are different packages webpack includes both "ui-kit" in the bundle. However most of modules in "ui-kit" are still exactly the same and there is no need to duplicate them in bundle.
