[BUG] Error `cause` not being respected

[mmkal]

🐞 Bug report

Description

We are calling Sentry.report(new Error('Something bad happened'), {cause: 'Some useful context about the bad thing'}) on a micro-sentry client, but we only see the "Something bad happened" message in sentry.io. I would expect the cause to appear under the "extras" section in the Sentry UI. It's not in the JSON payload sent to sentry a all though

Reproduction

I don't know that it's possible to reproduce in stackblitz since it's about what gets sent to sentry, but it should be easy to reproduce if you have a local sentry set up. Just create a new @micro-sentry/browser client and call the code snippet above.

Expected behavior

Include cause (MDN docs)

Versions

• Package [e.g. @micro-sentry/[email protected]]

If needed:

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Angular/React/Vue [e.g. Angular 11]

Additional context