Doesn't work with Webpack 5

This project has a dependency on `@babel/runtime` version `7.2.0` however Webpack 5 has enabled strict mode on ESM module imports which `7.2.0` violates and therefore won't compile. This has already been fixed upstream by `7.12.0` (see discussion here https://github.com/babel/babel/issues/12058), the dependency needs updating in `package.json` in this repo.

Open package.json and inspect the @babel/runtime dependency. Compare the current version with the upstream fix referenced in the issue, then verify that the project compiles with Webpack 5 without the strict ESM error. Done means the dependency is updated and the Webpack 5 compilation issue is resolved.

Written by the indexing model from the issue text.