ts-odd unit tests running in browsers

[bdehaynin]

Summary

Problem

Unit tests are currently run in node only. They may unexpectedly fail in the browser.

Impact

We may miss some error cases.

Solution

Run unit tests in headless browsers using playwright-test.

[bgins]

A first step in the task was completed by updating the unit tests to use assert instead of expect: https://github.com/oddsdk/ts-odd/pull/541

In addition, packaging changes were needed in rs-wnfs to support both node and headless browsers at the simultaneously: https://github.com/wnfs-wg/rs-wnfs/pull/318

The ODD SDK needs a few other changes to align with this newer version of rs-wnfs. When that is complete, it should be possible to get the browser tests running.

[icidasset]

@bgins I just upgraded to the latest rs-wnfs with your wasm packaging changes on the next branch. PR that was merged recently: https://github.com/oddsdk/ts-odd/pull/536