Bundled version of terser 5.18.2 with emscripten patches

We maintain a few downstream patches to terser which means we can't use the version published in npm.

This terser.js bundle in this directory was built from our fork of terser which lives at: https://github.com/emscripten-core/terser/

The current patches are stored in the emscripten_patches_v4.8.0 branch.

To make changes to this code please submit patches to https://github.com/emscripten-core/terser/ and then re-create this bundle using the following steps:

$ CI=1 npx rollup -c $ cp dist/bundle.min.js $EMSCRIPTEN_ROOT/third_party/terser/terser.js