Add support async handlers

[maxcbc]

Hi folks,

I had an idea to support catching errors in an async function without an 'unhandledPromiseRejectionError'.

This gives developers the freedom to throw again but also means they don't have to do the following pattern.

async function (req, res, next) {
  let result;
  try {
    result = await something();
  } catch (err) {
    next(err);
  }
  res.send(result);
}

They can instead do:

async function (req, res, next) {
  res.send(await something());
}

PR done as an idea: #3695

[dougwilson]

We have some promise based ones and I think that would include async functions. Regardless we would love to see your idea! Thanks for opening an issue before making a PR because you may have accidentally made one against this repo on accident. Please make any router change PRs to the repo https://github.com/pillarjs/router and not this repo 👍

[maxcbc]

Thanks Doug. Will do.

[maxcbc]

@dougwilson Should I close this issue and re-raise on https://github.com/pillarjs/router ?

[dougwilson]

Closing as issue + PR opened in router module.