Allow custom watchOptions for webpack.watch

[pradel]

This pr allow to pass custom watchOptions to webpack.
I am currently using backpack ( thanks btw :) ) in my project and I run into an issue with webpack and docker for mac (you can find the issue here).
To fix my issue I need to be able to setup webpack watchOptions.

Here is a working example:

// backpack.config.js
module.exports = {
  webpack: (config) => {
    config.watchOptions = { poll: true };
    return config;
  },
};

[jaredpalmer]

LGTM

[pradel]

@jaredpalmer thanks! Would you mind publishing a patch version? 😃

[jaredpalmer]

Done

[pradel]

Thank you!