fix: catch uncaught errors in express middleware so they can be passed onwards to the express error handler

[larrysingh]

Summary

Currently the withLogto middleware does not have a try catch block which sometimes leads to uncaught errors and middleware limbo with the request hanging. This PR fixes it by wrapping all the middleware logic in a try/catch block to ensure errors are caught appropriately and they are passed onwards to the next middleware which can be a custom error handler, etc. depending on the user and application.

Testing

I made the changes locally and tried it with my application and the hanging issues were resolved as the error was now able to be caught and handled.

Checklist

• .changeset - Not sure
• unit tests N/A
• integration tests N/A
• necessary TSDoc comments - Done

[larrysingh]

@xiaoyijun

[wangsijie]

What about an onError parameter?

[larrysingh]

What about an onError parameter?

Can you give me an example of that?

[wangsijie]

@larrysingh check this: https://github.com/logto-io/js/blob/master/packages/next/src/index.ts#L62