Not reduce bundle size as expected

There is a project that has been written in Typescript.
bundle size with `babel/preset-env` is 101.29KB minified & gzipped also bundle size with `babel/preset-modules` is 100.27 KB minified & gzipped.
here is a repository that you can check:
[sample-react-redux-typescript](https://github.com/zerob4wl/sample-react-redux-typescript/tree/babel/preset-modules)
I removed polyfills for a better comparison of bundle size.
you can run `yarn analysis` for viewing bundle size.
node version: v12.12.0

Use the linked sample-react-redux-typescript repository and run `yarn analysis` with the Babel preset configurations described in the report. Compare the minified and gzipped output and determine whether the reported size difference is reproducible; done means the cause and expected bundle-size behavior are documented or corrected.

Written by the indexing model from the issue text.