Minification breaks module exports

[kaiwetlesen]

The minifier moves the exports outside of the two if statements as it is considered canonical to have only one module.exports.

Steps to reproduce:

• Install package into some project, and call exported method
• Run npx -y minify-all-cli -s node_modules -d node_modules_minified && rm -rf node_modules && cp -r node_modules_minified node_modules

This breaks calls to the module with a reference error. PR 1 would fix this

[Cadienvan]

Hi! As the author seem to have abandoned the current project, I replicated it and credited him in the README.

I also fixed the mentioned issue.

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