Repro Webpack module lib format's un-treeshakeable output

Run yarn here
Run yarn build
Run yarn link
With CRA application or something else run yarn link webpacklib-esm-test
Include MyButton in the app. You should see 'Click me' as expected in production output.
Unexpectedly you should also see 'Hello', which should have been shaken out.

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
dist		dist
src		src
.gitignore		.gitignore
README.md		README.md
package.json		package.json
tsconfig.json		tsconfig.json
webpack.config.ts		webpack.config.ts
yarn.lock		yarn.lock

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