This PR reworks the serialization code to use JSON.stringify and JSON.parse instead of structured clone and a third-party serialization polyfill/helper. A new function called configureSerialization(...) has been added to provide developers with a way to plug back in the more advanced serialization approach if they want/need it for their app.

Checklist

• run yarn build
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

Issues

• Fixes bug: use of top level awaits and node modules causes bunding errors #32

Notes

A couple of critical things are left undone. I'm looking for some help/feedback on:

• I am still unable to run the build on Windows out-of-the-box, so I didn't verify by running the build or tests. We'll see what happens with CI.
• I didn't make changes to the custom build scripts for rollup, etc. There was a lot of code there and I'm not very familiar with custom rollup solutions in general. Perhaps someone else can remove the vestiges of the old polyfill system that are still there.
• Please let me know where you want me to document configureSerialization(...) and I'll amend this PR with that (assuming you support the approach I took).