fix: import history from ESM

[ryanflorence]

Removing closure compiiler fixes the problem. The build is now much faster and the resulting file size difference is marginal.

The UMD production file size went from 6,105 bytes with closure compiler to 6,164 without it. We can afford 59 bytes to get ESM support.

[ryanflorence]

I verified manually with this:

npm run build
mkdir ~/Desktop/test
touch ~/Desktop/test/go.mjs
cp -R build ~/Desktop/test/node_modules

Then running this script works as expected:

import { createMemoryHistory } from 'history';
console.log(createMemoryHistory);

[kristoferbaxter]

Seems like a smart tradeoff to me as well.

Does this mean the dependency can also be removed in package.json? I didn't see another usage.