Add support for catching async handler errors

[dheeraj-p]

Currently next-connect has onError option to catch errors thrown by handlers and send relevant response. But it doesn't work with async handlers. What I would like to have is error thrown from a async handler should get caught in onError without have to write try/catch blocks and then pass the error to next(Error) function.

import nextConnect from 'next-connect';
handler = nextConnect({ onError });

handler.use(async (req, res) => {
  throw new Error("Something failed");
});

[hoangvvo]

@dheeraj-p Thanks for reporting! Fixed in 0.6.2.

[dheeraj-p]

Thank you so much