test: catch and fail on uncaught exceptions and rejections

[fryorcraken]

This is a bug report/feature or change request/support request

Problem

uncaughtException and unhandledRejection can happen when an exception is thrown or a promise rejects in an internal process not directly instantiated and caught by the user.

See #1584 (comment)

Proposed Solutions

Ensure that no such occurrence happens when running js-test by listening for these NodeJS event for all tests and failing them if one is caught.

Notes

[danisharora099]

ensure all async operations are "caught"/handled
perhaps can find some rule in eslint around the same

ideal to have a wide net sort of an approach

[danisharora099]

@weboko and @danisharora099 to look into possible solutions

[fryorcraken]

perhaps can find some rule in eslint around the same

Here we go: https://typescript-eslint.io/rules/no-floating-promises/ that would be a good start