fix: remove uncaught exception handler

[achingbrain]

There are no circumstances under which it is safe to ignore uncaught exceptions, since the application is left in an unconsistent state.

The node documentation is unequivocal about this:

https://nodejs.org/api/process.html#warning-using-uncaughtexception-correctly

Any code that can throw an exception should be wrapped in a try/catch or there should be some other method of handling the error.

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works

[achingbrain]

With the latest helia sessions PR code I've been running the until-death npm script without the uncaught exception handler for nearly two days with no crashes and pretty flat memory usage:

[SgtPooki]

With the latest helia sessions PR code I've been running the until-death npm script without the uncaught exception handler for nearly two days with no crashes and pretty flat memory usage:

FYI that it was Helia-DR and Helia (all) specifically that were mentioned as failing in #18 by Dennis

[SgtPooki]

I believe this is good to remove (as far as tiros falling over goes) with the fix in #158