Print a readable error instead of dumping the whole error object to the console.

[mcampa]

What?

Print a readable error when a npm module is missing, or any other webpack error, instead of dumping the whole error object to the console.

Example:

Module not found: Error: Cannot resolve module 'lazysizes' in /Users/mario.campa/stencil/assets/js/theme resolve module lazysizes in /Users/mario.campa/stencil/assets/js/theme
  looking for modules in /Users/mario.campa/stencil/node_modules
    /Users/mario.campa/stencil/node_modules/lazysizes doesn't exist (module as directory)
    resolve 'file' lazysizes in /Users/mario.campa/stencil/node_modules
      resolve file
        /Users/mario.campa/stencil/node_modules/lazysizes doesn't exist
        /Users/mario.campa/stencil/node_modules/lazysizes.webpack.js doesn't exist
        /Users/mario.campa/stencil/node_modules/lazysizes.web.js doesn't exist
        /Users/mario.campa/stencil/node_modules/lazysizes.js doesn't exist
        /Users/mario.campa/stencil/node_modules/lazysizes.json doesn't exist

@bigcommerce/stencil-team